1.

P = (-2, 1) Gradient at P is -1.

Q = (0, 0) Gradient at Qis 0.

R = (2, 1) Gradient at R is 1.

2.

P = (-2.5, -2) Gradient at P is approximately 3.

Q = (0, 1) Gradient at Qis approximately 0.

R = (2, 2) Gradient at R is 1.

3.

P = (-1, 1) Gradient at P is 1.

Q = (1, 2) Gradient at Q is 0.

R = (4.5, -1.5) Gradient at R is approximately -3.