Question

Deon is putting money into a checking account. Let y represent the total amount of money in the account (in dollars). Let x represent the number of weeks Deon has been adding money. Suppose that x and y are related by the equation y =550+50x

What is the change per week in the amount of money in the account?
What was the starting amount of money in that account ?

Answer 1

@mathstudent55

Answer 2

from 50 x you can imagine how much is added per week.

Answer 3

if x=0 what is the amount?

Answer 4

if x=1
50 x=?

Answer 5

50?

Answer 6

that means 50 dollars are added per week

Answer 7

wen x=0,y=?

Answer 8

correction
when x=0,y=?

Answer 9

ok so whats the starting number

Answer 10

y=550+50x

Answer 11

when x=0
y=?

Answer 12

This gives you initial amount

Answer 13

y = 550 + 50x

No matter what x is, there is always a 550 in the equation.
The amount $550 does not change. If x = 0 (at the beginning), or if x = 1 (at the end of the 1st week), or for any other x value, there is always 550 there. That means the account already had $550 before he started adding $50 per week.


The 50 is being multiplied by x.

If x = 0, then 50x = 50(0) = 0. At week 0, he has added 0 to the $550.

At week 1, x = 1, and 50x = 50(1) = 50. At week 1 he has added $50.

At week 2, x = 2, and 50x = 50(2) = 100. At week 2 he has added $100. $50 from week 1 and $50 more from week 2.

At week 3, 50x = 50(3) = 150, so at week 3 he has added $150 from the 3 weekly $50 deposits.

This should make clear how to answer the two questions.

Answer 14

after 1 week amount=550+50*1=600
after 2 week amount=550+50*2=550+100=650
after 3 week amount 550+50*3=550+150=700
.......
700-650=650-600=50 so amount added each week=50 dollar.