Question

Consider the partial set of values for the functions f(x) and g(x):

Answer 1

The first row represents the input. The second row represents the value that the function f assumes for each input above. The third row represents the value that the function g assumes for each input above.

To compute f(1), we look for 1 in the first row (third column) and we look for the correspondent value for f. In this case, we have f(1)=4

Similarly, we look for 3 in the first row (last column) and we look for the value of g. In this case, we have g(3)=3.

Now we can plug the values in the formula:

$f(1)+2g(3) = 4+2\cdot 3 = 4+6=10$