Answer:
Step-by-step explanation:
We want to solve 2x - y = 7 for y. Start by changing the signs of all terms, obtaining -2x + y = -7. Now add 2x to both sides, obtaining y = 2x - 7.
Now evaluate this at x = -1: y(-1) = 2(-1) - 7 = -2 - 7 = -9
Now evaluate this at x = 0: y(0) = 2(0) - 7 = 0 - 7 = -7
Now evaluate this at x = 1: y(1) = 2(1) - 7 = 2 - 7 = -5
