To vertically strech a function, f(x) by a factor of c, that is cf(x)
so strech vertically by 2 means times whole thing by 2
so
2 times (4x^2-5) =8x^2-10
g(x)=8x^2-10
Answer:

Step-by-step explanation:
We want to factor the common monomial out of :

The greatest common monomial fact is

We factor to get:

The expression in the parenthesis has no common factor again since we factored the greatest common factor.
The equation : y = -5x + 9
y=19x+9 would be the rule