the point Q has coordinates (2,3) The point R has coordinates (a, b) A line perpendicular to QR is given by the equation 5x+2y=9 Find an expression for b in terms of a

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