Question

An electrician charges a fee of $40 plus $25 per hour. Let y be the cost in dollars of using the electrician for x hours. Choose the correct equation.

y = 40x - 25


y = 25x + 40


y = 25x - 40


y = 40x + 25

Answer 1

The correct equation to represent the cost in dollars (y) of using the electrician for x hours is y = 40x + 25. The independent variable is x, the number of hours, and the dependent variable is y, the cost in dollars. The y-intercept is 25 and the slope is 40.

Step-by-step explanation:

The correct equation to represent the cost in dollars (y) of using the electrician for x hours is y = 40x + 25.

To find the equation, we start with the fixed fee of $40, which is represented by the constant term. Then we add the fee per hour, which is $25x, where x represents the number of hours. Since the fee per hour is added, the correct equation is y = 40x + 25.

The independent variable in this equation is x, which represents the number of hours. The dependent variable is y, which represents the cost in dollars. The y-intercept is the constant term, which in this case is 25, and the slope is the coefficient of x, which is 40.

Answer 2

y = 25x + 40

Step-by-step explanation:

The electrician charges $25 per hour.

The number of hours is x.

Therefore after x hours the electrician will charge $25x. (multiply the charge by the number of hours $25 * x)

Therefore fee(y) charged by the electrician = $40 + $25x

Hence y = 25x + 40