This question wants me to know which functions have a positive rate of change and which have a negative rate of change? So the answer must be either positive rate or negative rate.
Could some one help with four practice questions by chance? XD

Question

This question wants me to know which functions have a positive rate of change and which have a negative rate of change? So the answer must be either positive rate or negative rate.
Could some one help with four practice questions by chance? XD

anonymous · Answer

The first one is 
2x – 3y = 9
... I think its a positive rate..? Im sort of guessing XD

anonymous · Answer

@swissgirl @jim_thompson5910 Could either of you help me??

jim_thompson5910 · Answer

are you able to solve 2x – 3y = 9 for y?

anonymous · Answer

um... i think its... i dont know XD i think i need help with that too

jim_thompson5910 · Answer

start by subtracting 2x from both sides

anonymous · Answer

ok so thats -3y = 9 - 2x

jim_thompson5910 · Answer

yes

jim_thompson5910 · Answer

that's the same as 

-3y = -2x + 9

jim_thompson5910 · Answer

how do we go from -3y to just y ?

anonymous · Answer

we divide 3 from both sides?

jim_thompson5910 · Answer

-3 actually

jim_thompson5910 · Answer

but you have the right idea

anonymous · Answer

oh yeah oop XD

anonymous · Answer

so thats y = -2x + -3 ?

jim_thompson5910 · Answer

you forgot to divide the -2x by -3

jim_thompson5910 · Answer

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