PLEASE answer asap its due in a few

Ineed to know the answer to this algebra question.

2. explain in words how you plot the point (4, −2) in a rectangular coordinate system.

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