Finding outputs of a one-step function

Introduction

In this lesson, we have one-step functions modeling real world problems. In such cases we find outputs of those functions.

Example 1

After eating at a restaurant, Joe, Tom, Bill and Sunny decided to divide the bill evenly. If the total bill given by the function Ax = 4x amounted to $136, how much should each pay(x)?

Solution

Step 1:

Total bill amount Ax = 4x = $136

Step 2:

4×4 = $ 1364

So x = $34

Example 2

Shania is baking a cake. The recipe calls for Cy = y + 3 cups of flour. How many cups does she need if y = 5 cups?

Solution

Step 1:

Cups of flour, Cy = y + 3 cups; y = 5

Step 2:

Cy = y + 3 = 5 + 3 = 8

So C5 = 8 cups