given that (-8,-1) is on the graph of f(x) find the corresponding point for the function f(-2/3x)

Question

given that (-8,-1) is on the graph of f(x) find the corresponding point for the function  f(-2/3x)

anonymous · Answer

@dan815 can you help???

dan815 · Answer

okay multiplying x by a numbers will rescale or invert the axis

dan815 · Answer

the negative will make it reflect across the y axis |dw:1403883142423:dw|

dan815 · Answer

and the 2/3 will make it 3/2 times bigger, since you would see more values of x to get the same result, there will be a horizontal stretch

dan815 · Answer

so the point becomes
(-8,-1)----> (-8*-3/2,1) = (12,1)

anonymous · Answer

i found but thanks it was -12,1

anonymous · Answer

but i am suck on one again given that (-1,-3) is on the graph of f(x) find the corresponding point for the function  -3f(x)

dan815 · Answer

its (12,-1)**