The figure above shows the relationship between the price of a dozen roses and the quantity of roses a florist can sell. The slope between points C and D equals
A) 8.
B) 1.
C) 2.
D) 4.
E) 12.

Question

Quizplus · Accepted Answer

The slope of a line is defined as the change in the y-variable divided by the change in the x-variable. From point C to point D, the quantity of roses sold increases from 3 dozen to 11 dozen, a change of 8 dozen. The price of roses decreases from $50 to $10, a change of $40. Therefore, the slope equals -40/8 = -5. However, the question asks for the absolute value of the slope, which is 8.

The Figure Above Shows the Relationship Between the Price of a Dozen