Question

Walter buys a bus pass for $30. Everytime he rides the bus, money is deducted from the value of the pass. He rode 12 times and $24 was deducted from the value of the pass. How much does each bus ride cost?

Answer 1

Each bus ride costs two dollars.

Your slope for this would be: f(x)=-2x+30

What ever number you plug in for x you will find the total amount left of money. After plugging in 12 you end up with 6 Dollars. which after subtracting 6 from 30, you end up with 24 dollars being spent.