Question

For the function f (x)= 3\4x −5ˏ what is f (16)

Answer 1

Basically you substitute 16 in for x.
f(16) = 3/4(16) - 5
f(16) = 12 - 5
f(16) = 7

Answer 2

$f(x) = \frac{3}{4}x - 5 \\f(16) = \frac{3}{4}(16) - 5 \\f(16) = 12 - 5 \\f(16) = 7$