The function y = -3x + 44 represents the amount of money left in your school lunch account y (in dollars) after x days.

Question

Not sure where to start. I was sick the day they went over this.

Answer 1

Hi, Mary, If there are 10 days left of school, then the domain is{ x = 0,1,2,3,4,5,6,7,8,9,10}

Then, the range is the corresponding y- values for that domain.

y = -3x + 44 so

y = 44 at x = 0

y = 14 at x = 10

So the range would be {y = 14, 17, 20, 23, 26, 29, 32, 35, 38, 41, 44}

Answer 2

0 = -3x + 44

-44 = -3x

x = 44/3 = 14 and 2/3 days

Domain is x=0,1,2,3,4,5,6,7,8,9,10,11,12,13,14

Range is a currency amount representing the balance of the account

x=10 days ---> -3(10) = 44 + -30 = 44-30 = 14

As shown above you have 14 and 2/3 days left