Question

The rate a plumber charges is described by the function y = 21x + 45 where x is the number of hours worked and y is the total charge.

The function is 21 so what would be the y-intercept of the function

Answer 1

In the function \( y = 21x + 45 \), the term \( 45 \) represents the y-intercept. This means that when the number of hours worked (\( x \)) is \( 0 \), the total charge (\( y \)) is \( 45 \).

So, the y-intercept of the function is \( 45 \).