alicia bought a notebook and several erasers at the student store. the graph shows the relationship between…

alicia bought a notebook and several erasers at the student store. the graph shows the relationship between the total cost of her items and the number of erasers she purchased. what is the cost of each eraser? $1.00 $1.50 $2.00 $3.50 purchase at student store 10 9 8 7 total cost ($) 6 5 4 3 2 1 1 2 3 4 5 6 7 8 9 number of erasers

alicia bought a notebook and several erasers at the student store. the graph shows the relationship between the total cost of her items and the number of erasers she purchased. what is the cost of each eraser? $1.00 $1.50 $2.00 $3.50 purchase at student store 10 9 8 7 total cost ($) 6 5 4 3 2 1 1 2 3 4 5 6 7 8 9 number of erasers

Answer

Explanation:

Step1: Identify two points on the line

Let's take two points: (0, 2) and (2, 5). The y - intercept (when number of erasers = 0) is the cost of the notebook, which is $2.

Step2: Calculate the slope

The slope formula is $m=\frac{y_2 - y_1}{x_2 - x_1}$. Here, $x_1 = 0,y_1 = 2,x_2=2,y_2 = 5$. So $m=\frac{5 - 2}{2-0}=\frac{3}{2}=1.5$. The slope represents the cost per eraser.

Answer:

$1.50