PLEASE HELP ASAP Mrs. Jackson gives the table below to her students. In order for the function to be linear, what must a be and why? x 4 26,5 23 , 6 a Oa= 22 because the rate of change is 1. 5 23 Oa=20 because the rate of change is 3. 6 Oa= 22 because the rate of change is1 a =20 because the rate of change is 3.