To determine if (0,4) is a solution, we can plug it in for our x and y values:
Problem 1: 4(0) + 4 < 16
4 < 16, so this is a solution.
Problem 2: 2(0) + 2(4) > 8
0 + 8 > 8
8 is not greater than 8, it is equal to it. Therefore, it isn’t a solution.
Answer Recap: The answers are “yes” for the first equation, and “no” for the second equation.