Consider the function f(x). Select all of the following that include a vertical stretch of f(x)

A. -2f(x)
B. 0.25f(x)
C. -f(x) + 6
D. 5.5f(x) - 1
E. f(x) + 9
F. 7f(x)

A, D and F.

Step-by-step explanation:

If f(x) is a function and another function is defined as

If |k|>1, then it is clear vertical stretch.

If 0<|k|<1, then it is clear vertical compression.

In function ,

vertical stretch.

In function ,

vertical compression.

In function ,

neither stretch nor compression.

In function ,

vertical stretch.

In function ,

neither stretch nor compression.

In function ,

vertical stretch.

Hence, the correct options are A, D and F.

54 kilometers per hour

step-by-step explanation:

according to rules:

1 km = 1000 meter

which means that 1 meter = 1/1000 km

1 hour = 3600 second [ as 1 hour = 60 min = 60 *60 seconds ]

which means that 1 second = 1/3600 hour

therefore, 1 kilometer/hour =

thus to convert 15 meter per second to kilometer per hour, we multiply 15 to 3.6 kilometer/hour.

15 meter/second=   which is the required answer.