Question

Marty purchases cashews. The relationship between the cost and the number of pounds he purchases is modeled by the graph. which of the following best describes the slope of the line graphed? A: cashews cost $19 per pound.B: cashews cost $2 per poundC: Cashews cost $9.50 per poundD: cashews cost $28.50 per poundThanks!

Answer 1

The first step is to find the slope of the line. To determine the slope, the formula is

slope = (y2 - y1)/(x2 - x1)

From the graph,

x1 = 3, y1 = 28.5

x2 = 5, 47.5

Slope = (47.5 - 28.5)/(5 - 3) = 19/2

slope = 9.5

This value of slope is also referred to as the unit cost

Given that cost is on the y axis and number of pounds is on the x axis, the statement that best describes the slope of the line graphed is

C: Cashews cost $9.50 per pound