The number of hours per week that twenty students in a mathematics classroom study are represented by the data below. 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 5, 6, 7, 7, 7, 9, 9, 9, 9

Which statements about the data are true? Choose all that are correct.

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

Y=21.95x+10 y=22.45x solve by substitution

Solve for b. ab + c= d b= a + old ob=allc-ch b= (d-c/a