Help me please, just explain. How would I find f(1)?

f(1)=

x; -3, -2, -1, 0, 1, 2
f(x); 3.4, 0, -1.2, 0.4, 1.3, 1.7

Uh, look at the table.

1 is the 5th entry in the x row
1.3 is the 5th entry in the f(x) row.

So, f(1) = 1.3