Manuel got a new job and was given a hiring bonus along with his monthly salary. His earnings after months are modeled by the function f (x) = 1500x + 300. How much did he receive as a hiring bonus?

The hiring bonus can be found by plugging in x=0 and evaluating the function.

f(0) = 1500(0) + 300 = 0 + 300 = 300.

Therefore, Manuel received $300 as a hiring bonus.