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ax'y'z' is the image of axyz under a dilation through
point c. xz = 4 and x'z' = 5. what scale factor was used in
the dilation? *
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the answer choices are a) -1.25 b) -0.8 c) 0.8 d) 1.25

answer: it's a

step-by-step explanation:

- "runner b is moving at a slower rate."

- "the graphs shown are graphs of distance(km) against time(min).

the slopes of this graphs are are given by:

slope = (change in y)/(change in x)

= (change in distance)/(change in time)

this is the formula for finding the speed. so, the slope of these graphs represent the speed of the runner.

taking each division in the graph to represent 1 on both axis:

runner a ⇒ speed = (2-0)/(1-0)

= 2/1

= 2 km/min

runner b ⇒ speed = (3-0)/(3-0)

= 3/3

= 1 km/min

this shows that   runner b is moving at a slower rate."

answer:

c) the x-coordinate of the center of the circle increases by 3

b. f(x) = –√x + 3this is the correct answer