The ratio of blue beads to black beads mymaths

What are the domain and range of the function? f(x) = -4 (sqrt)x

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

Write ratios for the amount of oats to the amount of each of the other grains?