At the beginning of the summer Conan has $180 in the bank each week he deposits another $64 that he earns mowing lawns is his account balance proportional to the number of weeks since he started mowing lawns

Answer 1

For the balance to be directly proportional, we must have an equation with no constant
Bal = 64w

but we have Bal = 64w + 180

Looking at y = mx + b
y would not be proportional to x, because of the constant b
whereas y = mx is a direct proportion, or we can say that y is proportional to x