Question

1) Melissa will participate in a charity walkathon. Her mother will donate $10 for Melissa's

participation plus an additional $2 for each mile that Melissa walks.
a) If Melissa walks 15 miles, what will be the amount of her mother's donation?​

Answer 1

$40

Explanation:

we know that

The linear equation in slope intercept form i equal to

`y=mx+b`

where

y is the amount of her mother's donation

x is the number of miles that Melissa walks

where

m is the slope

b is the y-intercept

In this problem

The slope is

`m=\$2\ per\ mile`

The y-intercept is

`b=\$10`

substitute

`y=2x+10`

so

For x=15 miles

substitute

`y=2(15)+10=\$40`