Amir earns $9/h working in a coffee shop and $11.25/h working in a

grocery store. Last week he earned $288.

a)

Explain why

models this case.

b)

Is this relation a straight line? Explain.

c)

Determine the

x

- and

y

-intercepts. What do they mean?

d)

For how many hours might Amir have worked in each place?