What is the equation of the line PQ?
- y = x - 5
- y = x + 3
-
y = x + 5
- y = 2x + 3
- y = 2x - 3
The correct answer is: C
Explanation
The points P(-2, 3) and Q(2, 7) are on the line.
Gradient of the line = \(\frac{7 - 3}{2 - (-2)}\)
= \(\frac{4}{4}\)
= 1
y = x + b
To find the intercept, we have
7 = 2 + b or 3 = -2 + b.
Solving for b, we get b = 5.
\(\therefore\) The line is y = x + 5.