Which of the following coordinates exists on the line y= 3x +1? a. (3, 1) b. (-1, -2) c. (-3, 4) d. (2, 6)

y= 3x +1

If (3, 1)  then y = 3(3) + 1 = 10 ;so (3, 1)  is FALSE
If (-1, -2)  then y = 3(-1) + 1 = -2 ;so (-1, -2)  is TRUE
If (-3, 4)  then y = 3(-3) + 1 = -8 ;so (-3, 4)  is FALSE
If (2, 6) then y = 3(2) + 1 = 7 ;so (2, 6)  is FALSE

answer
B. (-1, -2) 

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