A similar analysis was done to explore the relationship between time spent studying and performance on the final exam. That correlation was found to be 0.63. What proportion of
the variation in final exam scores was left unexplained by this analysis? (report as a decimal
and round to 3 decimal places)

each side has a different length.  

step-by-step explanation:

option a is correct.

step-by-step explanation:

scale factor: it is used to find proportional measurements.

proportions means having the same ratio.

scale factor is the ratio of the model measurement to the actual measurement in a simplest form.

or we can say that the ratio of any two corresponding lengths in two similar geometric figures

if the scale factor is more than 1, then it is an enlargement,

if the scale factor less than 1, then it is a reduction.

given the two geometric figure:

by definition of proportions, we have

not sure but it may be b, as i said i'm not sure.

idk

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