$$\begin{array} { | l | l | }
\hline \text { Quantity } & \text { Price } \
\hline & 50 \
\hline & 40 \
\hline 16 & 30 \
\hline 24 & 20 \
\hline 32 & 10 \
\hline 36 & 5 \
\hline
\end{array}$$
-If we use the numbers in the above table to draw a graph, with the price on the vertical axis and the quantity on the horizontal axis, the line relating price and quantity has a slope of
A) 8.0.
B) 0.8.
C) -8.0.
D) -1.25.

Question

$$\begin{array} { | l | l | } 
\hline \text { Quantity } & \text { Price } \
\hline & 50 \
\hline & 40 \
\hline 16 & 30 \
\hline 24 & 20 \
\hline 32 & 10 \
\hline 36 & 5 \
\hline
\end{array}$$
-If we use the numbers in the above table to draw a graph, with the price on the vertical axis and the quantity on the horizontal axis, the line relating price and quantity has a slope of
A) 8.0.
B) 0.8.
C) -8.0.
D) -1.25.

Quizplus · Accepted Answer

The slope of the line is calculated as the change in price divided by the change in quantity. Using two points from the table, (16, 30) and (24, 20), the slope is (20 - 30) / (24 - 16) = -10 / 8 = -1.25.

-If We Use the Numbers in the Above Table to