Which function is a horizontal translation of the parent quadratic function f(x) =x^2

The value √10 and √15 are plotted on the number line

Δabc is dilated by a scale factor of 3 with the origin as the center of dilation to form δa′b′c′. the slope of is -1.2. the length of is p units, the length of is q units, and the length of is r units. the slope of is . the length of is units.

If a line is defined by the equation y = 5x + 2, what is the slope?