Question

Identify the equation that has a slope of 3 and includes the point (1, -2).

A. y + 2 = 3(x -1)

B. y - 1 = 3(x + 2)

C. y - 3 = 2(x -1)

D. None of these

Answer 1

Option A:
y + 2 = 3(x -1)
y + 2 = 3x - 3
y = 3x - 3 - 2
y = 3x - 5
∴Slope = 3

At (1, -2), x = 1
y = 3(1) - 5 = -2
∴ (1, -2) is on the line

Answer: A