Not all relations are straight lines when graphed. The graphs of some relations are curved lines. Use the_______vertical _______horizontal line test to determine whether these types of relations are functions.

We can determine whether a relation is a function by looking at itsgraph.→ No ______ points on the graph can have the same __-coordinate(lie on the same __________________ line).→ If a __________________ line drawn on the graph of any functiontouches two points, then the graph does not representa function. (called the ____________________ line test)❖ The only type of straight line that graph fails the vertical line test is a __________________ line.

A ________________ line is defined by theequation x = a, where a is any real number.A relation represented by x = a:is a function.is not a function.If we graph y = a, the graph will be a _________________line.A relation represented by y = a:is a function.is not a function.Which of these relations are functions?𝑦 = 5𝑦 = 2𝑥 − 5𝑥 = −22𝑦 = 𝑥 − 4

If we graph y = a, the graph will be a _________________line.A relation represented by y = a:is a function.is not a function

Which of the relations is not a function?

Decide if the following statement about functions is true or false:All relations are functions.