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Previous OS question http://openstudy.com/study#/updates/5372fefbe4b0c1175e755dc4

Y is the dependent variable

I understand that, but how do they get "y" if it wasn't even in the equation in the first place?

Could you help me solve it step by step please?

y = 3x -1

2^x = 3x - 1
so then
2^x = y
but y also equals "3x - 1"?

Exactly

y = 3x -1
y = 2^x
2^x = 3x-1
y = y????

@misssunshinexxoxo
I still don't understand

Never mind, I figured it out.