Pre-Algebra Review

Front

What is a function?

Back

A function is a relation where each input (x-value) has exactly one output (y-value).

Front

Which of the following sets of values is a function? (9,5) (10,5) (9,-5) (10,-5), (3,4) (4,-3) (7,4) (3, 8), (6,-5) (7, -3) (8, -1) (9, 1), (2, -2) (5, 9) (5, -7) (1, 4)

Back

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

Front

Is this mapping a function or not a function?

Back

This mapping is a function because each input corresponds to one output.

Front

What does the equation y = 75x represent?

Back

This equation represents a proportional relationship because it can be expressed as y = kx, where k is a constant.

Front

Back

The solution is k > -38. Graph the solution on a number line.

Front

Back

The solutions are x = 8 and x = -8.

Front

What is a proportional relationship?

Back

A proportional relationship is one where two quantities maintain a constant ratio.

Front

What is the difference between a function and a non-function?

Back

A function has one output for each input, while a non-function has at least one input with multiple outputs.

Front

How do you graph an inequality?

Back

To graph an inequality, use a number line and shade the region that satisfies the inequality.

Front

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

Back

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