Question

Solve the following system of linear equations graphically:

2x – y – 4 = 0
x + y +1 = 0

Find the points where the lines meet y-axis.

Answer 1

The two lines are intersecting at (1, –2)

The given system of equations has a unique solution x = 1, y = – 2

The line 2x – y – 4 = 0 meets y-axis at (0, – 4) and

x + y + 1 = 0 meets y-axis at (0, – 1).