## ramirokool Group Title John wants to rent movies over his school vacation. The cost for the movie rental is $4.50 per movie. John starts out with$20. Write an equation for the amount of money, y, John will have after x amount of movie rentals. Answer y = 20 - 4.50x y = 4.50x - 20 y = 20 + 4.50x y = 4.50x one year ago one year ago

1. ramirokool Group Title

@MiaKitty @UnkleRhaukus Help

2. MiaKitty Group Title

This is just like the question I helped you with earlier, but you have to combine them together, what do you think?

3. ramirokool Group Title

Either B or C

4. UnkleRhaukus Group Title

$y=mx+b$ where $$m$$ is the rate of change and $$b$$ is the initial value

5. MiaKitty Group Title

Well, it isn't B, because you don't subtract values in this equation, so?

6. uber1337h4xx0r Group Title

I have a question for you, ramiro: Let's say you buy two movies. How much money will you be left with?

7. ramirokool Group Title

Ummm probably 0

8. ramirokool Group Title

or at least 3 bucks or something

9. uber1337h4xx0r Group Title

Hmm... tell me this: how much would two movies cost?

10. MiaKitty Group Title

I have to go now! Anyone who can help Ramirocool can. :)

11. ramirokool Group Title

@UnkleRhaukus I got A

12. UnkleRhaukus Group Title

note $$mx+b=b+mx$$

13. ramirokool Group Title

@UnkleRhaukus D.

14. uber1337h4xx0r Group Title

@UnkleRhaukus : I think at Ramiro's age, formulas like that are more confusing that actually using real life examples. Granted, I'm under the impression that Ramiro doesn't care either way, so it probably doesn't matter.

15. UnkleRhaukus Group Title

if one movie costs $4.50 two movies costs 2×$4.50=

16. ramirokool Group Title

8.50

17. ramirokool Group Title

@UnkleRhaukus

18. uber1337h4xx0r Group Title

Close. But do it on paper to be safe.

19. ramirokool Group Title

@uber1337h4xx0r /yup B

20. UnkleRhaukus Group Title

$2\times4.50=2\times4+2\times0.50=8+1=$

21. ramirokool Group Title

@UnkleRhaukus Sorry for the long wait C.

22. ramirokool Group Title

Right?