Please Help! Quickly! What is the equation for the line in slope-intercept form?
Enter your answer in the box. Can you also please explain how you got the answer. Im not sure how to do this an would like to learn. Thank You!

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