Bill earns $12 per hour and works at most 40 hours per week. identify the independent and depended quantity in the situation, and find the reasonable domain and range values

Independent: how many hours he works Dependent: how much he makes

The independent is the number that usually does not change when another number changes so the independent is how much he makes in an hour. the dependent is the number that relies on another so the number of hours he works will be the dependent. he makes about $480 per week 
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The variables should add up to equal 1