Is A number decreased by four squared linear or non linear pls help

Write the slope-intercept form of the line that passes through the point (1, 0) and is parallel to x - y = 7. t

In the diagram, the ratios of two pairs of corresponding sides are equal to prove that almn - axyz by the sas similarity theorem, it also needs to be shown that x 6 z un z zz un = 2x zləzz lezy

What number is 7 units left of -15?