Multiple Choice
Identify the
letter of the choice that best completes the statement or answers the question.


1.

When
a relevant variable that is not named on either axis changes, a.  there will be a
movement along the curve.  b.  the curve may or may not change. It depends on how the
variables are related.  c.  the curve will be unaffected since only the variables on the
axis affect the curve.  d.  the curve will shift.   


2.

The
xcoordinate is the a.  first number of an ordered pair and represents the point's
horizontal location.  b.  second number of an ordered pair and represents the point's
horizontal location.  c.  first number of an ordered pair and represents the point's
vertical location.  d.  second number of an ordered pair and represents the point's
vertical location.   



Figure 210


3.

Refer
to Figure 210. The movement from point B to point C is a a.  shift of the
curve.  b.  change in price.  c.  movement along
the curve.  d.  change in costs to the firm.   


4.

Refer
to Figure 210. The price of roses and the quantity of roses are a.  directly related
and therefore move in the same direction.  b.  directly related and therefore move in opposite
directions.  c.  inversely related and therefore move in opposite
directions.  d.  independent of each other.   


5.

Refer
to Figure 210. The slope of the curve between points A and B is


6.

Refer
to Figure 210. The movement from point A to point B is a a.  shift of the
curve.  b.  change in preferences.  c.  movement along
the curve.  d.  All of the above are correct.   


7.

In
order to provide information on two variables, an economist must use a.  a bar
graph.  b.  pie chart.  c.  the coordinate
system.  d.  a timeseries graph.   



Figure 29


8.

Refer
to Figure 29. The correct designation of point A is: a.  (6,
0)  b.  (0,
24)  c.  (6,
24)  d.  (24,
6)   


9.

Refer
to Figure 29. What would you say about the relationship between coffee and hours without
sleep? a.  The less coffee
a person drinks per day, the more time he can go without sleep.  b.  There is no
relationship between how much coffee per day a person drinks and how long they can go without
sleep.  c.  The more coffee a person drinks per day, the longer he can go
without sleep.  d.  The relationship between cups of coffee per day and time
without sleep is too unpredictable to consider.   


10.

Refer
to Figure 29. Cups of coffee per day and the hours that someone can go without sleep
have a.  a positive
correlation.  b.  a negative correlation.  c.  a random
correlation.  d.  no correlation.   


11.

Which
of the following is NOT a problem associated with graphing in economics? a.  omitted
variables  b.  holding everything else constant  c.  reverse
causality  d.  the ability to show a relationship between 2
variables   


12.

In a
pie chart, each "slice" of the pie represents a.  a specific
percentage of the total pie.  b.  an equal share of the total pie.  c.  the amount of
the pie each of the two variables represents.  d.  onehalf of the
total pie.   


13.

The
slope of a straight line is calculated by a.  rise divided by run.  b.  run divided by
rise.  c.  the average of rise and run.  d.  rise plus
run.   


14.

Graphs such as bar graphs are limited in that they a.  can only show
variables that are positively related.  b.  are extremely difficult to
understand.  c.  provide information for only a single
variable.  d.  provide information on no more than 2
variables.   


15.

A
type of graph that can be used to display the relationship between two variables is a.  a pie
chart.  b.  a bar graph.  c.  a timeseries
graph.  d.  the coordinate system.   


16.

A
coordinate system is used to a.  show the flow of income and products in an economic
system.  b.  organize labor and other resources in the production
process.  c.  allow economists to show two variables on a single
graph.  d.  teach economists how to draw graphs
consistently.   


17.

The
slope of a line is calculated by a.  change in x/change in y.  b.  change in
y/change in x.  c.  x/y.  d.  x + y.   


18.

The
slope of a fairly flat upwardsloping line will be a a.  small positive
number.  b.  large positive number.  c.  small negative
number.  d.  large negative number.   


19.

The
ycoordinate is the a.  first number of an ordered pair and represents the point's
horizontal location.  b.  second number of an ordered pair and represents the point's
horizontal location.  c.  first number of an ordered pair and represents the point's
vertical location.  d.  second number of an ordered pair and represents the point's
vertical location.   


20.

The
ordered pair that represents the origin on a graph is a.  (1,
1).  b.  (0,
0).  c.  (0,
1).  d.  (1,
0).   


21.

Which
of the following statements about slope is NOT correct? a.  Slope explains
how much one variable responds to changes in another variable.  b.  Slope can be
computed by delta x/delta y.  c.  Slope is positive if the 2 variables are moving in the same
direction.  d.  Slope does not change if the line is
linear.   


22.

When
a variable on an axis of a graph changes, the curve a.  will not
shift.  b.  will shift.  c.  may or may not
change. It depends on how the variables are related.  d.  will shift if
the variable is on the vertical axis, but not on the horizontal axis.   


23.

An
ordered pair is a.  the process of
checking calculations twice before placing them on a graph.  b.  two numbers
which can be represented by a single point on a graph.  c.  two numbers that
are represented by sidebyside points on a graph.  d.  two points on a
graph which are equal distances from the origin.   


24.

Which
of the following is a correct statement about slope? a.  A horizontal
line has an infinite slope, and a vertical line has a zero slope.  b.  A horizontal
line has a slope of 1, and a vertical line has a slope of 1.  c.  A horizontal
line has a zero slope, and a vertical line has an infinite slope.  d.  None of the
above are correct.   


25.

The
point where both x and y are zero is known as the a.  origin.  b.  null.  c.  zero coordinate.  d.  center.   
