Four straight lines have the following equations

- \(3x+8y=59\)
- \(x-2y=1\)
- \(y-4x=3\)
- \(3y+2x=-19\)

How many intersections do you expect?

### Some more points…

Three of the four lines above will enclose a triangle where each point on the triangle has negative coordinates.

Which three lines?

Once you have answered these, you will be ready to move to the main problem.