2 A fitness assessment was administered to all the fifth grade students at Clear Creek Elementary. Part of the assessment included a sit-up challenge. They did
as many sit-ups as they could for one minute and recorded their results in the
following stem-and-leaf plot.
Stem Leaf
26. 6. 7 8 8 9
30 0 2 2 4 4 6 7 7 8 9 9
4 0 1 2 2 2 3 3 4 4
How many students were able to complete as least one sit-up every 2 seconds?
A 2
B 8
с
12
D
21

3

step-by-step explanation:

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let f (x ) is a function and c be a positive real number,   the graph of the function g (x ) = f (cx ) is represented as follows.

when, c > 1,   the function compresses it in the x - direction.

when, 0 < c < 1, the function stretches it.

the function is g ( x ) = (9x )2.

the heighest power of x in g ( x ) = (9x )2 is 2, so the parent function is square function.

the equation of parent function is f ( x ) = x 2 .

the function is g ( x ) = (9x )2 and the parent function is f ( x ) = x 2 .

so, the functions f and g have the following relationship.

g ( x ) = f ( 9x ).

compare the function g ( x ) = f ( 9x ) with g (x ) = f (cx ).

c = 9 ( > 1 ).

so, the function g (x ) = (9x )2 compresses it in the x - direction.

step-by-step explanation: