Question

How do I write this in function notation part b

Answer 1

SOLUTION

Given the question in the image, the following are the solution steps to answer the question.

STEP 1: Write the given details

Total rice bought is 75kg

Each week, he used 4.5kg, this means in w weeks, he will use:

$4.5\times w=4.5w$

STEP 2: Get the remaining kilograms of rice after w weeks

This will be gotten by using the function below:

$75-4.5w$

Hence, the function will be gotten as:

$r(w)=75-4.5w$