Graph

y=log base 3 (x+7)

It asks to graph, but i am just having problem solving for points(Y)

I know that you can also graph this function in exponential form

3^y=x+7

however, i tried to substitute in for x in the log function, but getting wrong answers

x=-7

y=log base 3(-7+7) = 1

expo

x=-6

3^y=-6+7

3^y=1

y=1

I am substituting different numbers for x but getting same answer, in fact the -6 is correct not the -7.

How do i find y in a using the log function?

Thank You