To increase her number of students, the instructor put a coupon in the local paper offering to waive the one-time fee for new
students. what is the value of the coupon?
$14
$20
$30
$50

$20

Step-by-step explanation:

Let

x ----> the number of lessons

y ----> the total cost

Find the slope of the linear equation

The formula to calculate the slope between two points is equal to

take two points from the graph

(1,50) and (2,80)

substitute

Find the equation of the line in slope intercept form

where

m is the slope

b is the y-intercept or initial value

we have

substitute

the linear equation is

The term

represent the y-intercept or one-time fee for new students

therefore

The value of the coupon is $20

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step-by-step explanation: