Q.If D = 150 − 50P, then the slope is :

For the demand function D = 150 − 50P, the slope is the coefficient of P, which is −50, so the answer is option (c).

The demand function is D = 150 − 50P. In a linear function of the form D = a + bP, the slope is the coefficient b, which measures the rate of change of demand with respect to price.

Here:

• a = 150 (the intercept, demand when P = 0)
• b = −50 (the coefficient of P) …