The price of a t-shirt is $50.00. If you buy 4 shirts, you will get 10% discount. How much will the discount be if you buy 8 shirts?

I believe it's 20%, if for every 4 shirts you get 10% discount then if you have two sets of 4 shirts the discount doubles, making it 20%

step-by-step explanation:

let

we know that

the y-intercept is the y-coordinate of the point when the value of x is equal to zero

so

the y-coordinate of the point a is the y-intercept

the answer part a) is

the value of y-intercept is

part b) find the slope m

we know that

the value of the slope is equal to

substitute the values

therefore

the answer part b) is

the value of the slope is equal to

the general answer is

the slope is

the value of y-intercept is