kelly is trying to decide which plan to use to downloade songs. which plan offers the lowes cost per song plan a 8 songs for 9.60 plan b 10 songs for 12.50

Astudent draws two parabolas both parabolas cross the x axis at (-4,0) and (6,0) the y intercept of the first parabolas 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