Circle one best answer.




1.
R-1 F01139

Refer to the above diagram. The slope of curve ZZ at point A is:
A.+2.
B.+21/2.
C.-21/2.
D.+4.



2.
R-1 F01139

Refer to the above diagram. The slope of curve ZZ at point C is:
A.-4.
B.-2.
C.-22/5.
D.+3.



3. The slope of a line parallel to the vertical axis is:
A.zero.
B.one.
C.infinite.
D.one-half.


4. The measured slope of a line:
A.is independent of how the two variables are denominated.
B.will be affected by how the two variables are denominated.
C.necessarily diminishes as one moves rightward on the line.
D.necessarily increases as one moves rightward on the line.


5. Slopes of lines are especially important in economics because:
A.they measure marginal changes.
B.they always tell us something about profits.
C.positive slopes are always preferred to negative slopes.
D.they always relate to resource and output scarcity.


6.


R-2 F01134

In the above diagram variables x and y are:
A.both dependent variables.
B.directly related.
C.inversely related.
D.unrelated.



7.


R-2 F01134

In the above diagram the vertical intercept and slope are:
A.4 and -11/3 respectively.
B.3 and -11/3 respectively.
C.3 and + 3/4 respectively.
D.4 and + 3/4 respectively.



8.


R-2 F01134

In the above diagram the equation for this line is:
A.y = 4 - 11/3 x.
B.y = 3 + 3/4 x.
C.y = 4 - 3/4 x.
D.y = 4 + 11/3 x.



9. If we are considering the relationship between two variables and release one of the "other things equal" assumptions, we would expect:
A.the relationship to change from direct to inverse.
B.the line representing that relationship on a graph to change locations.
C.the data points to have a tighter fit to the line representing the relationship.
D.the relationship to change from inverse to direct.


10. The amount of pizzas that consumers want to buy per week is reflected in the equation P = 15 - .02Qd, where Qd is the amount of pizzas purchased per week and P is the price of pizzas. On the basis of this information we can say that:
A.if pizzas were free, people would consume 800 per week.
B.more pizzas will be purchased at a high price than at a low price.
C.if the price of pizzas is $6, then 150 will be purchased.
D.50 fewer pizzas will be purchased per week for every $1 increase in price.


11.
Answer the next question(s) on the basis of the following five data sets wherein it is assumed that the variable shown on the left is the independent variable and the one on the right is the dependent variable. Assume in graphing these data that the independent variable is shown on the horizontal axis and the dependent variable on the vertical axis.

R-3 REF01123

Refer to the above data sets. The variables are directly related in:
A.all five data sets.
B.in none of the data sets.
C.in data sets 1, 2, and 3 only.
D.in data sets 1, 2, and 5 only.



12.
Answer the next question(s) on the basis of the following five data sets wherein it is assumed that the variable shown on the left is the independent variable and the one on the right is the dependent variable. Assume in graphing these data that the independent variable is shown on the horizontal axis and the dependent variable on the vertical axis.

R-3 REF01123

Refer to the above data sets. For which data set(s) is the vertical intercept zero?
A.data set 4
B.data set 5
C.data sets 2 and 3
D.data set 1



13.
Answer the next question(s) on the basis of the following five data sets wherein it is assumed that the variable shown on the left is the independent variable and the one on the right is the dependent variable. Assume in graphing these data that the independent variable is shown on the horizontal axis and the dependent variable on the vertical axis.

R-3 REF01123

Refer to the above data sets. Which of the data sets would graph as an upsloping line?
A.1 only
B.1, 2, and 3 only
C.4 and 5 only
D.1, 2, and 5 only



14. If the equation y = 5 + 6x was graphed, the:
A.slope would be -5.
B.slope would be +5.
C.slope would be +.6.
D.vertical intercept would be +.6.


15. If the equation y = -10 + 2.5x was plotted:
A.the vertical intercept would be -10.
B.the slope would be -7.5.
C.it would graph as a downsloping line.
D.the slope would be -10.



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