Question

FAN+MEDAL PLS HELP
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 1

@legomyego180 @kittiwitti1 @agent0smith @javyb13 @FaiqRaees @Loser66

Answer 2

@javyb13

Answer 3

okkk lets get startedd

Answer 4

yaa

Answer 5

ok so these are the rules
y = cos(x) transforms to y = cos(kx)
k > 1 ---->horizontal shrink
0<k<1 ---->horizontal stretch
and
y = cos(x) transforms to y = Acos(x)
|A| > 1 ----> vertical stretch
|A| < 1 ----> vertical shrink

Answer 6

k

Answer 7

i just want to make sure my answers r right

Answer 8

mkay so lets see here

Answer 9

let me work these out ok

Answer 10

ty

Answer 11

1.C
2.D
3.C
4.C
im a little unsure about 3 and 4 but im pretty sure i did it right its been some time since ive done this

Answer 12

ok ty

Answer 13

your welcome :)