Q:
# How Do You Figure Out If a Relation Is a Function?

**One can determine if a relation is a function by graphing the relation, drawing a vertical line on the graph and then checking whether the line crosses the graph at more than one point.** If the line crosses the graph only once, the relation is a function.

If the relation is represented in the form of a T-chart listing x- and y-coordinates, the two columns are examined closely to ensure no x-value is matched to more than one y-value. If there is a one-to-one correspondence from x-values to y-values, the relation is a function.

To decide whether a relation is a function, when expressed as an equation, one solves for y and notes whether the equation has more than one solution. If there is only one possible correct answer, the relation is a function.

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Q:
## How Do You Tell If a Graph Is a Function?

A: In order to determine whether a graph is a function or not, a vertical line test can be performed on the graph. If a vertical line drawn on any point in th... Full Answer >Filed Under: -
Q:
## What Are Some Common Uses for Vertical Line Graphs?

A: One common mathematical use for graphs of vertical lines is to determine whether or not another graph qualifies as a function. Vertical line graphs also ha... Full Answer >Filed Under: -
Q:
## What Is the End Behavior of Rational Functions?

A: The end behaviors of a rational function refer to its shape toward the right and left ends of its graph. Rational function end behaviors are similar to tho... Full Answer >Filed Under: -
Q:
## How Do You Determine If a Relation Is a Function?

A: Determine if a relation is a function by analyzing its ordered pairs, solving for y, or using the vertical line test. The best method depends on whether th... Full Answer >Filed Under: