REVIEW HOMEWORK 12/17

Front

1) A plumber charges $25 for a service call plus $50 per hour of service. Write an equation for the given situation.

Back

y = 50x + 25, where y is the total cost and x is the number of hours.

Front

2) The cost to rent a car at the Johnson Car Rental is $29 per day plus a $50 non-refundable insurance cost. Write an equation to represent the given situation.

Back

y = 29x + 50, where y is the total cost and x is the number of days.

Front

3) What is the SLOPE?

Back

Front

4) You are buying a sweatshirt that was $50 last week. For some reason, the store is selling it for $60 this week. What is the percent increase for the price of the sweatshirt?

Back

Increase 20%. Percent increase is calculated as \( \frac{new - old}{old} \times 100 \) = \( \frac{60 - 50}{50} \times 100 = 20\% \).

Front

5) What is the SLOPE?

Back

Front

6) What is the formula for calculating percent increase?

Back

Percent Increase = \( \frac{new - old}{old} \times 100 \) .

Front

7) Define a linear equation.

Back

A linear equation is an equation that makes a straight line when graphed. It can be written in the form y = mx + b, where m is the slope and b is the y-intercept.

Front

8) What does the y-intercept represent in a linear equation?

Back

The y-intercept is the point where the line crosses the y-axis, representing the value of y when x = 0.

Front

9) How do you find the slope from two points?

Back

Slope (m) = \( \frac{y_2 - y_1}{x_2 - x_1} \) where (x1, y1) and (x2, y2) are the coordinates of the two points.

Front

10) What is a non-refundable fee?

Back

A non-refundable fee is a charge that cannot be returned or refunded once paid.