1. If f(x) = -2x 2+ 7, then which of the following is the value of f(-2)? (1) 1
(3) 15
(2) 23
(4) -1

Astudent draws two parabolas on graph paper. both parabolas cross the x-axis at (–4, 0) and (6, 0). the y-intercept of the first parabola is (0, –12). the y-intercept of the second parabola is (0, –24). what is the positive difference between the a values for the two functions that describe the parabolas? write your answer as a decimal rounded to the nearest tenth