Why is not reasonable to say that 4.23 is less than 4.135

Aline passes through 3,7 and 6,9 what equation represents the line

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

Write the slope intercept equation for line ab.