Question

The graph of which of the following equations contains the points (2, 3) and (3, 2)?

y = x - 1
y = 5 - x
y = 7 - 2x

Answer 1

See, you are given points, just substitute in the equations given, and check which one is satisfying those points..

Answer 2

In \((2,3)\), \(x=2\) and \(y=3\)..

So, put these values in, for example, first equation:
\(y = x-1 \\ 3 = 2-1 \\ but \; 3 \ne 1\), so this point is not satisfying first equation..

Similarly, check for other two equations..