The y-values must be unique.

The x-values must be unique.

The relationship must involve time.

The graph must be a straight line.

Weight

Time

Temperature

Money

To measure different variables.

To make the graph more complex.

To ensure only one prediction at a time.

To allow multiple predictions at the same time.

To determine if a graph is linear.

To measure the slope of a graph.

To find the y-intercept of a graph.

To check if a graph represents a function.

It should not intersect the graph at all.

It should intersect the graph at the origin.

It should intersect the graph at exactly one point.

It should intersect the graph at multiple points.

A graph where each x-value has a unique y-value.

A linear graph with a constant slope.

A graph where a vertical line intersects at multiple points.

A piecewise linear function.

The graph is a function.

The graph represents time.

The graph is linear.

The graph is not a function.

By ensuring the y-values do not repeat.

By ensuring the x-values do not repeat.

By looking for a constant rate of change.

By checking if the table forms a straight line.

Inputs

Outputs

Domains

Ranges

A quadratic function

A linear function

A vertical line

A horizontal line