8th Grade Math Review (Old Work)

Front

What is a function in mathematics?

Back

A function is a relation between a set of inputs and a set of possible outputs where each input is related to exactly one output.

Front

How can you determine if a set of ordered pairs is a function?

Back

A set of ordered pairs is a function if no x-value is repeated with a different y-value.

Front

What is an example of a set of ordered pairs that represents a function?

Back

(6,-5), (7,-3), (8,-1), (9,1) is a function because each x-value is unique.

Front

What is a rational number?

Back

A rational number is any number that can be expressed as a fraction or ratio of two integers, including repeating decimals.

Front

What type of slope does a line have if it goes down from left to right?

Back

A line with a downward trend from left to right has a negative slope.

Front

What is the y-intercept in a linear equation?

Back

The y-intercept is the value of y when x is 0 in the equation of a line.

Front

In the equation y = 2x + 3, what does the number 3 represent?

Back

In the equation y = 2x + 3, the number 3 represents the y-intercept.

Front

What is the slope-intercept form of a linear equation?

Back

The slope-intercept form of a linear equation is y = mx + b, where m is the slope and b is the y-intercept.

Front

What does a positive slope indicate about a line?

Back

A positive slope indicates that as x increases, y also increases, resulting in an upward trend.

Front

What is the difference between a function and a relation?

Back

A relation is any set of ordered pairs, while a function is a specific type of relation where each input has exactly one output.