Question

1. real-world scenario

a streaming service charges $15 each month with no sign-up fee.
is the total cost proportional to the number of months?
yes / no
explain:

Explanation:

Set up the relationship equation

$$ y = 15x $$

Verify the proportionality condition

$$ \frac{y}{x} = 15 $$

Check the initial value

$$ y(0) = 0 $$

Answer:

Yes