Apositive number and a negative number between 1 and -1

Identify the expression equivalent to 4(x + x + 7) − 2x + 8 − 4 by substituting x = 1 and x = 2.

Which equation is represented by the graph below?

Find the equation of the least squares regression line if: x-bar = 2 sx = 2.3 y-bar = 22 sy = 4.1 r = - 0.94 y-hat = 18.64x + 1.68 y-hat = 25.35 - 1.68x y-hat = 18.64 - 1.68x y-hat = 25.35x - 1.68