Question

Determine which line the point (1, -2) lies on.y = x + 5y = 2x + 1y = 2x - 4y = x -2

Answer 1

The Solution:

Given the point (1,-2).

We are required to find the line on which the point (1,-2) lies.

The line where point (1,-2) lies is the line that will give -2 for y when x=1.

So, substituting 1 for x in the line below:

$\begin{gathered} y=2x-4 \\ \text{ when x=1, we get} \\ y=2(1)-4=2-4=-2 \end{gathered}$

This is the only line that meets the condition.

Therefore, the correct answer is

$y=2x-4$