8th Grade Math Semester Exam Review

Front

What is the formula for slope in a linear equation?

Back

The formula for slope (m) is m = (y2 - y1) / (x2 - x1).

Front

What is the range of integers that 12.5 falls between?

Back

12 and 13.

Front

If Papaya charges $5 per DVD rental and a $10 membership fee, and Hutto charges $2 per DVD and a $60 membership fee, how do you represent when Papaya's charges are less than Hutto's?

Back

10 + 5d < 60 + 2d.

Front

How do you find the number of minutes until two buckets have the same amount of water?

Back

Set up an equation based on their rates and solve for x.

Front

What is the cost structure for The Rug Store's carpet installation?

Back

$80 installation fee plus $9.50 per square yard.

Front

What is the cost structure for The Magic Carpet's carpet installation?

Back

$120 installation fee plus $7.50 per square yard.

Front

How do you write an inequality to compare costs of two carpet installation services?

Back

Set up an inequality based on their cost equations.

Front

What does it mean for two quantities to be equal in a word problem?

Back

It means to set their expressions equal to each other and solve for the variable.

Front

What is the significance of the y-intercept 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

How do you determine the slope from a graph?

Back

The slope is the rise over run, calculated as the change in y divided by the change in x.