In order to complete the table it is only necessary to evaluate each function for x = 3.
To do this, replace by 3 where x is on each expression and solve the math operations, just as follow:
f(x) = 3x + 5
f(3) = 3(3) + 5 = 15 + 5 = 20
f(x) = 1/2 x² - 1.5
f(3) = 1/2 (3)² - 1.5 = 1/2 (9) - 1.5 = 3
f(x) = 3/(2x)
f(3) = 3/(2(3)) = 3/6 = 1/2 = 0.5
Hence, the numerical values to complete the table are 20, 3 and 0.5
