Question

write and equation for the following transformation of y=x' a vertical stretch by a factor of 4

Answer 1

it would be y-4=x'

Answer 2

how did you get that though? its a workpad. im confused.

Answer 3

okay let me clarify . have you got question ?

Answer 4

i just am not sure how you got that. if its a vertical stretch does that mean you just put a subtraction sign?

Answer 5

nope i got my interpretation of question its like this
you got graph of y=x'

and now you wanna stretch that graph in vertical direction by 4 units

here we have a basic rule if you wanna shift the graph of y=f(x) by 'a' units

what you do is subtract a from y

so your equation of new shifted graph is y-a=f(x)

now you know why i subtracted 4 from y

Answer 6

oh ok that makes more since. thank you for your help :)

Answer 7

you are most welcome !! :)