If the graph of y=x^2 is vertically stretched by the factor 3, reflected over the x-axis, translated left 7 and up 9, what would be the equation?

A) y = - 3 (x + 7) ^2 + 9

B) y = (3x + 7) ^2 + 9

C) y = 3 (x + 7) ^2 + 9

D) y = (-3x + 7) ^2 + 9

I need the step by step answer for 1/3 (9x+3) = 3x+1

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