Write an equation for the following transformation of y = x: a vertical stretch by a factor of 4.

Question

opcode · Answer

Y = Vertical axis.
X = Horizontal axis. 
$\color{red}{\text{Vertical stretch by a factor of four}}.$

opcode · Answer

I cannot give you the answer just hint do you understand this part?

anonymous · Answer

so I multiply y by 4 does that work?

anonymous · Answer

4y = x

wolfe8 · Answer

I'm not sure, but I think when it is stretched, it means that now it will cover a larger area for the same x. So I think that is right.

opcode · Answer

So sorry for ignoring you, just kinda got lost in my homework.

opcode · Answer

Remember: $$C = Shrinking~or~stretching~factor$$
Shrinking graphs:
$$y = c~(x - h)^2 + k \Rightarrow (h, k) = vertex$$
Absolute value:
$$y = c~|x - h| + k \Rightarrow (h, k) = vertex$$
$$-1 < c < 1;~c \neq 0~\text{This means to shrink.}$$
Stretching graphs:
$$c > 1;~ c < -1\text{This means to stretch.}$$