Question

Which of the following points lies on the line whose equation is y = 2 x - 3? (0, 3) (1, -1) (-1, 4)

Answer 1

The equation of the line: y = 2x - 3

Put the coordinates of the points to the equation and check the equality:

(0, 3) → x = 0, y = 3

L = 3, R = 2(0) - 3 = -3

L ≠ R   INCORRECT  :(

(1, -1) → x = 1, y = -1

L = -1, R = 2(1) - 3 = 2 - 3 = -1

L = R   CORRECT :)

(-1, 4) → x = -1, y = 4

L = 4, R = 2(-1) - 3 = -2 - 3 = -5

L ≠ R   INCORRECT :(

Answer: (1, -1)