Intersects a vertical line ONLY ONCE…function
Intersects a vertical line MORE THAN ONCE…not a function
Intersects a horizontal line ONLY ONCE…its inverse is a function
Intersects a horizontal line MORE THAN ONCE…its inverse is not a function
Intersects a vertical line ONLY ONCE…function
Intersects a vertical line MORE THAN ONCE…not a function
Intersects a horizontal line ONLY ONCE…its inverse is a function
Intersects a horizontal line MORE THAN ONCE…its inverse is not a function