Hi Ron;
Welcome to Wyzant!!!
2x + y = 5
Let's try the first set of coordinates, (2, –1)...
2(2)1=5
41=5
3=5Does NOT work.
Second; (1, 2)
2(1)+2=5
2+2=5
4=5Does NOT work.
Let's try the third set of coordinates, (3, –1)...
2(3)1=5
61=5
5=5ANSWER!!!!
12/10/2013

Vivian L.