Functions Line Test

Is this the graph of a function for all real values of x? Why?

• Yes. Any vertical line drawn intersects the graph at exactly 1 point.

• No. The vertical line x = 0 intersects the graph at 2 points.

• No. The vertical line x = 0 does not intersect the graph.

Is this the graph of a function for all real values of x? Why?

• Yes. Any vertical line drawn intersects the graph at exactly 1 point.

• No. The vertical line x = 0 intersects the graph at 2 points.

• No. The vertical line x = 0 does not intersect the graph.

Is this the graph of a function for all real values of x? Why?

• Yes. Any vertical line drawn intersects the graph at exactly 1 point.

• No. The vertical line x = 0 intersects the graph at 2 points.

• No. The vertical line x = 0 does not intersect the graph.

Is this the graph of a function for all real values of x? Why?

• Yes. Any vertical line drawn intersects the graph at exactly 1 point.

• No. The vertical line x = 0 intersects the graph at 2 points.

• No. The vertical line x = 0 does not intersect the graph.

Is this the graph of a function for all real values of x? Why?

• Yes. Any vertical line drawn intersects the graph at exactly 1 point.

• No. The vertical line x = 0 intersects the graph at 2 points.

• No. The vertical line x = 0 does not intersect the graph.

Is this the graph of a function for x > - 2 ? Why?

• Yes. Any vertical line drawn intersects the graph at exactly 1 point.

• No. The vertical line x = 0 intersects the graph at 2 points.

• No. The vertical line x = 0 does not intersect the graph.

Is this the graph of a function for all real values of x? Why?

• Yes. Any vertical line drawn intersects the graph at exactly 1 point.

• No. The vertical line x = 0 intersects the graph at 2 points.

• No. The vertical line x = 0 does not intersect the graph.

Is this the graph of a function for all real values of x? Why?

• Yes. Any vertical line drawn intersects the graph at exactly 1 point.

• No. The vertical line x = 0 intersects the graph at 2 points.

• No. The vertical line x = 0 does not intersect the graph.

Is this the graph of a function for all real values of x? Why?

• Yes. Any vertical line drawn intersects the graph at exactly 1 point.

• No. The vertical line x = 0 intersects the graph at 2 points.

• No. The vertical line x = 0 does not intersect the graph.

Does the graph represent a function?

• Yes, because the vertical line test shows there are no repeating input values

• No, because the vertical line test shows there are repeating input values