Both figures are similar. What is the length of the missing side?
1 answer:
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The parent square root function has a starting point at the origin. In standard form that would look like this: 
, where the number inside the radical with the x indicates side to side movement, and the number following either a + or a - indicates up or down movement. Our movement is up or down, since there is no number with the x under the radical. Because that is +2, our parent graph moves up to units from an original starting point of (0, 0) to a new one of (0, 2). Summary: the parent graph moves up 2 units, third choice above