Calculate the gradient (slope) of the joining points (-1, 1) and (2, -2)
A
-1
B
\(\frac{-1}{2}\)
C
\(\frac{1}{2}\)
D
1
Verified Correct Answer: A.
Step-by-Step Mathematical Solution
Gradient = m = \(\frac{y_2 - y_1}{x_2 - x_1}\)
= \(\frac{-2 -1}{2 + 1}\)
= \(\frac{-3}{3}\)
= -1
Source: Myschool Past Questions Archive (Record #50001)