The following advertised prices were graphed on a coordinate grid to show the cost of various numbers of
shirts based on the advertised price. Which advertised price’s graph would have a slope of $12 per shirt?

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