By using the given points, we conclude that:
(f + g)(1) = -2.
Remember that for two functions f(x) and g(x) we have that:
(f + g)(x) = f(x) + g(x).
Here we want to get:
(f + g)(1) = f(1) + g(1).
If you look at the tables, you can see that point (1, -1) belongs to f(x), which means that:
f(1) = -1
And for the table of g we also can see the point (1, -1), then:
g(1) = -1
Replacing that, we get:
(f + g)(1) = f(1) + g(1) = (-1) + (-1) = -2
If you want to learn more about functions:
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