Bill earns $12 per hour and works at most 40 hourss per week.

Independent influences the dependent
hours worked influences pay
independent=hours worked
dependent=pay

domain is input or hours worked, from 0 to 40

range is ouput or in this cas pay
if work 0 hours, get 0 dollars
if work 40 hours, get 40*12=480
range is from 0 to 480

hours worked, pay, 0 to 40,  0 to 480

C is answer

How much is 32 out of 40 written as a percentage? convert fraction (ratio) 32 / 40 answer:   80%