Question

PLEASEEEEEEEEE HELP I AM FAILING :(((

8) Identify a horizontal or vertical stretch or compression of the function ƒ(x) = x^2 by observing the equation of the function g(x)=(1/4 x)^2

A) A vertical stretch by a factor of 4.
B) A horizontal stretch by a factor of 4.
C) A horizontal compression by a factor of 4.
D) A vertical compression by a factor of 4.

12) Identify a transformation of the function f(x)=square root x by observing the equation of the function g(x)=square root x-87
A) A horizontal shift 87 units to the right.
B) A horizontal shift 87 units to the left.
C) A vertical shift 87 units downward.
D) A vertical shift 87 units upward.

13) evaluate the piecewise function at the indicated values from the domain:
f(x)= { [x], if x<-1 x^2, if -14

A) ƒ(-2) = 2
B) ƒ(−2) = −4
C) ƒ(-2) = -2
D) ƒ(-2) = 4

18) Identify a transformation of the function f(x)=1/x by observing the equation of the function g(x)=1/3+3

A) A horizontal shift 3 units to the right.
B) A vertical shift 3 units upward.
C) A vertical shift 3 units downward.
D) A horizontal shift 3 units to the left.
Attachment
this picture is for number 13

Answer 1

8 (D)
12(C) (Considering it is (square root of x) - 87, and not square root of (x-87).)
18(C) (Again, same as above. You need to write in parentheses, if applicable.)
13 I can't understand the question. Am I missing an equation?
Best answer me please.

Answer 2

Explanation:

8) Here y becomes 16y. Hence there is a vertical compression

D)

12) horizontal shift of 87 units to the right

13) since for x <-1 f(x) = [x] we have

f(-2)=-2 since -2 is the greatest integer contained in itself.

Option C

18) if it is 1/(x+3) then 3 units to left.