Question

zaid buys a loaf of bread and some broccoli. the graph shows the total cost of the purchase, y, as a function of the number of pounds of broccoli, x. the initial value is 4. it represents the cost of the loaf of bread. the rate of change is 2. it represents the cost of each pound of broccoli. write an equation to represent the total cost, y. y = x + ?

Explanation:

Step1: Recall slope - intercept form

The equation of a line in slope - intercept form is $y = mx + b$, where $m$ is the slope (rate of change) and $b$ is the y - intercept (initial value).

Step2: Identify values from problem

We are given that the rate of change (slope $m$) is 2 and the initial value (y - intercept $b$) is 4.

Answer:

$y = 2x+4$