the graph below shows the amount of money left in the schools desk fund, f, after d desks have been…

the graph below shows the amount of money left in the schools desk fund, f, after d desks have been purchased. for each new desk that is purchased, by how much does the amount of money left in the schools desk fund decrease? desk fund amount dollars left in fund 800 700 600 500 (2, 480) 400 300 200 100 (5, 150) 1 2 3 4 5 6 7 8 9 d number of desks purchased $110 $135 $165 $190

the graph below shows the amount of money left in the schools desk fund, f, after d desks have been purchased. for each new desk that is purchased, by how much does the amount of money left in the schools desk fund decrease? desk fund amount dollars left in fund 800 700 600 500 (2, 480) 400 300 200 100 (5, 150) 1 2 3 4 5 6 7 8 9 d number of desks purchased $110 $135 $165 $190

Answer

Explanation:

Step1: Identify two points

We have points $(2,480)$ and $(5,150)$ from the graph.

Step2: Calculate the slope

The slope formula is $m=\frac{y_2 - y_1}{x_2 - x_1}$. Here, $x_1 = 2,y_1=480,x_2 = 5,y_2 = 150$. So $m=\frac{150 - 480}{5 - 2}=\frac{- 330}{3}=-110$. The negative sign indicates a decrease. The amount by which the money in the fund decreases per - desk is the absolute value of the slope.

Answer:

$110$