Vertical line test -
Vertical line test
Slide the vertical line across the function to determine if the curve is a function or not.
If the line only touches the curve one point at a time then it’s a function.
If at any point the line touches more than one point then it’s not a function.
Does this graph represent a function? Explain your reasoning.
Does this graph represent a function? Explain your reasoning.
Does this graph represent a function? Explain your reasoning.
Does this graph represent a function? Explain your reasoning.
Does this graph represent a function? Explain your reasoning.
Does this graph represent a function? Explain your reasoning.
Does this graph represent a function? Explain your reasoning.
Summary
Well done! You’ve completed this exercise.
Here's a brief summary of what you discovered:
- If the vertical line only touches one point on the curve at a time then it's a function.
- If the vertical line touches more than one point at a time then it's not a function.
- All linear relations are functions.
- All circles are not functions.
If you're still unsure about what constitutes a function and what does not, repeat the exercise as many times as you'd like.
