Suppose you are saving money for a new cell phone. At week 0 you have $20 and at week 10 you have $100.
y = the amount of money you have saved
x = represents the number of weeks
Find and interpret the slope of the linear equation.

Would it be y = 10x + 20?

Question

Suppose you are saving money for a new cell phone. At week 0 you have $20 and at week 10 you have $100. 
y = the amount of money you have saved
x = represents the number of weeks
Find and interpret the slope of the linear equation.

Would it be y = 10x + 20?

anonymous · Answer

no it is y = 8x + 20

anonymous · Answer

How do you get 8?

anonymous · Answer

See after 10 weeks you have to save $100

anonymous · Answer

You have $20 now, so you have to save $80 more

anonymous · Answer

You have 10 weeks to save $80, so how much do you need to save per week?
=$80/10

anonymous · Answer

Ohh... >.< That makes sense, thank you. :3

anonymous · Answer

No problem!