Question

An equation in the system is y = x + 1. What is the other equation in the system if the solution is only at (0, 1)?

Answer 1

y = - x + 1 is an example.

Explanation:

It could be y = -x + 1. In fact it could be one of many other equations that passes through the point (0, 1). Any equation of the form y = mx + 1 will fit the bill, for example x = 2x + 1 or - 1/2 x + 1.