## Phebe one year ago ****RATE OF CHANGE **** http://prntscr.com/7rnwmm

1. nincompoop

so every time you see rate of change problem, you are looking for a slope-related solution. can you try to solve the problem now based on the hint I gave you?

2. Phebe

Well i was already given that hint. i suppsed to use mx+b right?

3. nincompoop

something like it, but you're missing a lot of other information

4. Phebe

please tell me what im missing. i really need to get this right

5. nincompoop

it has to be an equation

6. Phebe

yea it is 5x+3y=-2

7. nincompoop

so how will you convert that into slope-intercept form?

8. Phebe

i forgot

9. nincompoop

$$ax + by = c$$ $$ax - ax + by = c - ax$$ $$\large\frac{by}{b} = \frac{-ax}{b} + \frac{c}{b} \rightarrow y = \frac{-ax + c}{b}$$

10. nincompoop

it is just a matter of algebraic manipulation that requires you to solve for y

11. nincompoop

a and b are your coefficients for the x and y respectively and c is the constant

12. Phebe

so ummmm............. i get that but what do i put for the letters

13. nincompoop

do you know how to solve for y (isolate y) ?

14. Phebe

Yes i do

15. nincompoop

try

16. Phebe

okay i know i suppse to solve for y , All i need is the equation? How do i get the equation

17. nincompoop

uh when you solve for y, you have an equation in terms of y and that is what you need to be able to identify the "rate of change," which is the slope (coefficient) of x in the equation

18. nincompoop

SOLVE for y, right now

19. nincompoop

I do not need a "suppose," I just need you to show me that you can actually solve for y

20. Phebe

the equation is 5x+3y=-2 right?

21. nincompoop

why are you asking me, isn't that the problem you're given?

22. Phebe

yes

23. nincompoop

what makes an equation is the presence of the equal sign

24. Phebe

Oh wait i get how to do it! thanks for everything!!