For each of the following regression equations, explain how the criterion variable (Y) changes as the predictor

Question:

For each of the following regression equations, explain how the criterion variable (Y) changes as the predictor variable (X) increases. Hint: You can find the answer by looking at the equation.
(a) Y̑ = 0.75X − 2.40
(b) Y̑ = −3.02X − 0.90
(c) Y̑ = 2.10X + 10
(d) Y̑ = −3.14X + 12