Are Your Graphs Functions? Test Your Knowledge!

What is the key characteristic of a function in terms of x and y values?

• Each x value can have multiple y values.

• Each x value can have only one unique y value.

• Each y value can have multiple x values.

• Each y value can have only one unique x value.

Tags

CCSS.8.F.A.1

What is the vertical line test used for?

• To calculate the area under a curve.

• To find the slope of a line.

• To identify the x-intercept of a graph.

• To determine if a graph is a function.

If a vertical line crosses a graph more than once, what does it indicate?

• The graph has no y-intercept.

• The graph has no x-intercept.

• The graph is not a function.

• The graph is a function.

Why is the graph of a 'C' shape not a function?

• It has no x values.

• It has no y values.

• It is a straight line.

• It crosses a vertical line more than once.

What does it mean if a vertical line crosses a 'V' shape graph only once?

• The graph is not a function.

• The graph is a function.

• The graph has no x-intercept.

• The graph has no y-intercept.

What is the result of drawing a vertical line through a vertical line graph?

• It crosses more than once, so it's not a function.

• It crosses only once, so it's a function.

• It does not cross at all.

• It crosses at the origin.

Why are vertical lines not considered functions?

• They have no y values.

• They cross a vertical line more than once.

• They have no x values.

• They are horizontal.

What happens when you draw vertical lines through a horizontal line graph?

• They cross at the origin.

• They cross more than once.

• They cross only once.

• They do not cross at all.

Why are horizontal lines considered functions?

• They are vertical.

• They have no x values.

• They cross a vertical line only once.

• They cross a vertical line more than once.

What is true about oblique (slanted) lines in terms of functions?

• They are horizontal.

• They cross a vertical line only once.

• They do not cross at all.

• They cross a vertical line more than once.