Question

Suppose your bank charges you a $10 monthly service charge and 15 cents per transaction.

Write a linear equation modeling the charges from the bank on your account.

Interpret the y-intercept

Answer 1

10+.15x= y where x represents transactions, and y represents total charges

Answer 2

So you know that you start with 10. That is the y intercept. then do .15 times x transactions and make a linear equation.

Answer 3

Ok, so just like before, we're looking for an equation that looks like y = mx+b.

X is the number of transactions, so your m is 0.15, and the month starts out with $10 charged, so

y = 0.15x+10

B is also the y-intercept, and in this case, it shows how much you get charged when x = 0; that is, when you don't use the account.