Question : 81) With y measured the vertical axis and x measured : 1237968

81) With y measured on the vertical axis and x measured on the horizontal axis, the slope of a straight line is defined as

A) y/x.

B) x/y.

C) (change in y)/(change in x).

D) (change in x)/(change in y).

E) y – x.

82) In a graph, a straight line has a negative slope if the line

A) is vertical.

B) is horizontal.

C) falls from left to right.

D) rises from left to right.

E) shows a trend.

83) A curve with a positive but decreasing slope represents a relationship where, every time the variable measured along the horizontal axis increases by one unit, the variable measured along the vertical axis

A) increases by a constant amount.

B) increases by an increasing amount.

C) increases by a decreasing amount.

D) decreases.

E) does not change by much.

84) The slope

A) of a straight line is the same regardless of where on the line it is calculated.

B) equals the change in the value of the variable measured on the vertical axis divided by the change in the variable measured along the horizontal axis.

C) will be small if a large change in the variable measured on the vertical axis is associated with a small change in the variable measured along the horizontal axis.

D) Answers A and B are correct.

E) Answers A and C are correct.

85) Which of the following statements is correct?

A) The slope of a straight line changes depending where on the line it is calculated.

B) The slope of a curved line is not defined because it is impossible to calculate the slope along a curved line.

C) A straight line that slopes upward moving to the right has a positive slope.

D) Answers A and B are correct.

E) Answers A and C are correct.

86) If a small change in the x variable results in a large change in the y variable, the curve will be

A) positively sloped.

B) negatively sloped.

C) steep.

D) flat.

E) trended.

87) Suppose the relationship between a person’s age and his or her height is plotted with the age measured along the x-axis and the height measured along the y-axis. Then, the curve showing this relationship is

A) a straight line with a positive slope.

B) positively sloped and becoming less steep.

C) a straight line with a negative slope.

D) negatively sloped and becoming less steep.

E) positively sloped and becoming more steep.

88) If the quantity of the variable on the y-axis increases by 10 when the quantity of the variable on the x-axis decreases by 2, then the slope of the curve equals

A) 2.

B) -10.

C) 10.

D) -5.

E) None of the above answers is correct.

89) If the quantity of the variable on the y-axis increases by 3 when the quantity of the variable on the x-axis increases by 4, then the slope of the curve equals

A) 3.

B) 4.

C) 3/4.

D) 4/3.

E) 1.

90) The above figure shows the relationship between the price of a slice of pizza and how many slices of pizza Ricardo buys in a week. Between points A and B, the slope of the line equals

A) -5.

B) -4.

C) -3.

D) -1.

E) -2