Unit 4 Checkpoint Review

Front

What is the formula to calculate the cost per pound of an item before taxes?

Back

Cost per pound = (Total cost - Taxes) / Weight in pounds.

Front

If a coffee maker's price is reduced from $25 to $20, how do you calculate the percent decrease?

Back

Percent decrease = ((Original Price - New Price) / Original Price) * 100.

Front

Solve the inequality: -2x + 10 > -4. What is the solution for x?

Back

x < 7.

Front

What does the equation y = mx + b represent in a graph?

Back

It represents a linear equation where m is the slope and b is the y-intercept.

Front

If Joe saves $40 per month, how can you express the total amount in his savings account after x months?

Back

y = 40x + 150.

Front

What is the meaning of the term 'slope' in a linear equation?

Back

Slope represents the rate of change of y with respect to x.

Front

How do you find the total distance traveled if a family drives for 6 hours each day for x days?

Back

Total distance = 6 * x.

Front

What is the significance of the y-intercept in a linear graph?

Back

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

Front

What is the formula for calculating sales tax?

Back

Sales Tax = Price of item * Tax Rate.

Front

How do you determine if a number is a solution to an inequality?

Back

Substitute the number into the inequality and check if the statement is true.