Unit 5 Pre-Algebra Functions Review

Front

What is a function?

Back

A function is a relation that assigns exactly one output value for each input value. In other words, for every x-value, there is only one corresponding y-value.

Front

Which of the following sets of ordered pairs 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

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

Front

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

Back

Front

If m=3 and b=6, what is the slope-intercept equation?

Back

Front

What does the point (1, 4) represent in a function context?

Back

The point (1, 4) represents that when the input (x) is 1, the output (y) is 4.

Front

What is the y-intercept of a graph?

Back

The y-intercept is the point where the graph crosses the y-axis, represented as (0, b) where b is the y-value.

Front

What is the y-intercept shown on the graph if the options are (0, -2), (3, 0), (0, 3), None of these?

Back

The y-intercept is (0, 3).

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 two pairs have the same first element (x-value) with different second elements (y-values).

Front

What is the definition of slope in a linear function?

Back

Slope is a measure of the steepness of a line, calculated as the change in y divided by the change in x (rise over run).

Front

What does the slope of a line indicate?

Back

The slope indicates the direction and rate of change of the line; a positive slope means the line rises, while a negative slope means it falls.