The unit circle has a radius of 1 unit and is centered at the origin. It is dilated so that it passes through the point
(4,0).

What is the scale factor of dilation?

1/4
1/3
3
4

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