Data Analysis Question From ETS Quants Guide

GRE GRE Quant Problem Solving
1

Hey! I know this is a flipped screenshot, low quality question-- but I am unable to understand how to go about with solving this question from the Data Analysis Set Q11 on the ETS Quants Guide.

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The explanation in the book says that we can ignore the y-intercept altogether, however does that also not contribute to the value of y?

The correct answer is (E).

2

Think about this from the perspective of standard deviation. Does it change if you add a constant number to each element of a list?

3

Ohhh, got it! Thank you so much.