Question

HELP WILL FAN AND MEDAL!!!

Answer 1

Which transformation causes the described change in the graph of the function y=cos x?
1. Which one results in a horizontal shrink?
A. Cos (x/5)
B. 9cos(x)
C. Cos(3x)
D. Cos(x+2)

2. Which one results in a horizontal stretch?
A. 2/7cos(x)
B. -3cos(x)
C. Cos(7x)
D. Cos (x/3

3. Which one results in a vertical shrink?
A. Cos(x-2)
B. 2/3cos(x)
C. Cos(4x)
D. 2cos(x)

4. Which one results in a vertical stretch?
A. 1/3cos(x)
B. Cos(x+4)
C. Cos(-5x)
D. -5cos(x)

Answer 2

@sweetburger

Answer 3

@welshfella

Answer 4

if x values are helves; points get closer to y axis

Answer 5

so the first one would be c because multiplying x by some thing in parenthesis causes a horizontal shrink

Answer 6

do you understand?

Answer 7

so what do you think would happeb if you did the oppisite and divided x by some thing orl, multiplied it by a fraction?