Find the gradient of the line passing through the points P(1, 1) and Q(2, 5).
A
3
B
2
C
5
D
4
Verified Correct Answer: D.
Step-by-Step Mathematical Solution
Let (x1, y1) = (1, 1) and (x2, y2)= (2, 5)
then gradient m of \(\bar{PQ}\) is
m = \(\frac{y_2 - y_1}{x_2 - x_1}\) = \(\frac{5 - 1}{2 - 1}\)
= \(\frac{4}{1}\)
= 4
Source: WAEC / JAMB / NECO Classroom Archive (Record #29582)