Jessica is shopping at an online store that offers free shipping and doesn't charge her sales tax. Jessica orders two books for $8.99 each, a video game for $19.99, and three board games
for $11.99 each. She pays for her purchases with a $100 gift card. What is the remaining
balance on her gift card after these purchases?

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