Question

function rule for
x: 0,1,2,3,
y: 9,28,47,66

Answer 1

if x is 0 y = 9

so y = x + 9
if x= 1 y = 28

28 = a(1) + 9
28 - 9 = a
a= 19

so y = 19x + 9 test for x = 2 and 3