Functions (Part 1B) - Vertical 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 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.