Topic 3 Review 8th grade

Front

What is a function?

Back

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

Front

What does it mean for a mapping to be 'not a function'?

Back

A mapping is 'not a function' if at least one input is associated with more than one output.

Front

What is a linear function?

Back

A linear function is a function that graphs to a straight line, which can be expressed in the form y = mx + b.

Front

How can you determine if a graph represents a function?

Back

Use the vertical line test: if a vertical line intersects the graph at more than one point, it is not a function.

Front

What does it mean for a line to 'increase'?

Back

A line 'increases' if as the x-values increase, the y-values also increase.

Front

What does it mean for a line to 'decrease'?

Back

A line 'decreases' if as the x-values increase, the y-values decrease.

Front

What does it mean for a line to be 'constant'?

Back

A line is 'constant' if the y-value does not change as the x-value changes, resulting in a horizontal line.

Front

What is an ordered pair?

Back

An ordered pair is a pair of numbers (x, y) that represent a point on a coordinate plane.

Front

Can a function have the same y-value for different x-values?

Back

Yes, a function can have the same y-value for different x-values, as long as each x-value has only one corresponding y-value.

Front

What is the significance of the x-value in a function?

Back

The x-value is the input of the function, which determines the corresponding y-value (output).