Question

At the beginning of the year, Adrian's savings account balance was $28. Each week, he deposits another $15 into that account, and he doesn't spend any of his savings.
Is his savings account balance proportional to the number of weeks since the start of the year?

Answer 1

Answer:

Account balance is not proportional to the number of weeks.

Step-by-step explanation:

Initially Adrian's saving account balance was = $28

He deposits $15 in his account each week.

If we denote week with a variable 'x' then after 'x' weeks total amount in is account = $15x

So, total amount in his account after 'x' week will be;

y = 15x + 28

It's a linear equation representing total amount after 'x' weeks with a constant growth rate of 15 and initial amount 28.

In other words equation is in the form of y = mx +b.

This equation doesn't show the proportional relation because equation in the form of y = kx represents the relation of proportionality only.

Answer 2

Answer:

No

Step-by-step explanation:

No need because its too much to read xD