Question

the graph below shows the total cost for lunch, c, when will and his friends buy a large salad to share and several slices of pizza, p. for each additional slice of pizza that is purchased, by how much does the total cost of lunch increase? $1.50 $2.00 $2.50 $3.00

Explanation:

Step1: Find two points on the line

Let's take two points \((p_1,c_1)=(1,10)\) and \((p_2,c_2)=(2,12.5)\)

Step2: Calculate the slope

The slope formula is \(m = \frac{c_2 - c_1}{p_2 - p_1}\)
Substitute the values: \(m=\frac{12.5 - 10}{2 - 1}=\frac{2.5}{1}=2.5\)

Answer:

\(\$2.50\)