HELPPP PLEASEEE! I tried everything from adding to dividing, subtracting, multiplying but still no correct answer. Can someone help me out here please? I am not sure where to start either now. Thank you for your time.

You have some data points labeled by . They form the set {3, 5, 7}.

The mean, , is the average of these values:

Then in the column labeled , what you're doing is computing the difference between each data point and the mean :

These are sometimes called "residuals".

In the next column, you square these values:

and the variance of the data is the sum of these so-called "squared residuals".

f(x) is going down by 4

step-by-step explanation:

(its either that or its going left by 4)

square pyramid

step-by-step explanation:

square prism looks like nothing like that

triangular prism has a rectangular base instead of a square base

tetrahedron has a triangular base