Question

Jill earned $40 from a carpool plus $9 (h) per hour babysitting this week which of the following Expressions best represents Jill's income for the week A 9+40hB 9+h+40C 9h+40D 9+40

Answer 1

To write an equation that represents Jill's income for a week:

1. Identify each part in the next general equation:

$y=mx+b$

Initial value: b

Coefficient of change: m

The coefficient of change is the response given a one unit change. In this case she earned $9 each hour babysitting.

You give to the variable hour the letter h and multiply by 9: 9h (it means each hour she earns $9)

The initial value in this case is the amount she earns in the carpool: 40

You get the next expression for Jill's income for the week (y):

$y=9h+40$