Which expression makes the equation true for all values of x 16x-16=4

That table shows measurements (in invhes$ from cubes with different side lengths. which pairs of variables have a linear relationship? check all that apply

Sketch the region enclosed by the given curves. decide whether to integrate with respect to x or y. draw a typical approximating rectangle and label its height and width. y= 5x, y=7x^2then find the area s of the region.

Ijust need these 2 questions answered (the second pic is just confirmation i'm not confident in that answer)