Jambmaths question:
The gradient of the line joining (x, 4) and (1, 2) is ½ . Find the value of x.
Option A:
–5
Option B:
–3
Option C:
3
Option D:
5
Jamb Maths Solution:
$\begin{align} & \text{let }({{x}_{1}},{{y}_{1}})=(x,4)\text{ and }({{x}_{2}},{{y}_{2}})=(1,2) \\ & m=\frac{{{y}_{2}}-{{y}_{1}}}{{{x}_{2}}-{{x}_{1}}} \\ & \frac{1}{2}=\frac{2-4}{1-x} \\ & 1-x=-4 \\ & x=5 \\\end{align}$
Jamb Maths Topic:
Year of Exam: