Kimberly received $75 in interest on $1500 in her bank account. If the interest varies directly with the amount deposited, what equation represents this situation?

Step-by-step explanation:

Let represent interest and represent the amount.

Then we were given that: "the interest varies directly with the amount deposited".

This is written symbolically as:

When we introduce the constant of proportionality; we get:

From the question, when I=75, A=1500.

We substitute and solve for k.

Hence the required equation is

to determine the unit cost your would divide the total cost by the number sold.

7 bagels for $4.41       $4.41/7 = $.63 each at fresh side

5 bagels for $3.60         $3.60/5 = $.72 each at value mart