Emma is planning her summer and would like to work enough to travel and buy a new laptop. She can earn $90 each day, after deductions, and she can work a maximum of 40 days in July and August, combined. She expects each day of travel will cost her $150 and the laptop she hopes to buy costs $700.

a) provide a linear equation that represents the number of days Emma can work and travel and still earn enough for her laptop.

b) Sketch the graph of this relation.

For a, I got (90-700)/150=y. If that is wrong, could you please give the answer and explain how you go that.

-Thank You!