Question

Solve the equation, using the domain of x = {-1, 0, 2}.
2x + 3y = 7
A. {(-1, 3), (0, 7/3), (2, 1)}
B. {(3, -1), (7/3, 0), (1, 2)}
C. {(5, -1), (7/2, 0), (2, 1)}
D. {(-1, -3), (0, 7/3), (2, 1)}

Answer 1

Just check it in each case.

Answer 2

The domain of x is the values of x for which the function is defined. In other words, you can only plug -1, 0, and 2 into the equation.

So when your domain is -1, f(x) is the same as f(-1).