Roman C. answered 10/25/12
Masters of Education Graduate with Mathematics Expertise
You just need to plug in the numbers for x and y and see if the resulting equation is true. Remember in each ordered pair, the first number is the x value, and the second number is the y value.
For example with the first pair (2,-1) the equation becomes:
2 - 3*(-1) = -7.
Ask yourself: Is this equation true?
If so then circle the pair (2,-1), otherwise leave it uncircled.
Then repeat this with each of the other three pairs.