Discussion Questions
Functions and relations don’t always have to be defined in terms of equations! Any scribble on the xy-plane can be considered a relation, and any relation that passes the vertical line test is also a function.
For instance:
Even though this relation cannot be easily described by an equation, it still is a relation, with domain [-7, 1) ∪ [1, 8) and range [1, 8.5].
Additionally, this relation passes the vertical line test and thus is also considered a function. Note that a vertical line at x=1 intersects the function only at y=1, where there is a closed circle, and not at y=7, where there is an open circle.
In your initial post, answer the following:
Draw a relation and upload an image of your drawing. Make sure the coordinate grid is clearly visible.
You may use the following template coordinate grid:
Your relation may be any scribble(s) on this grid, but make sure the endpoints of each disconnected segment are drawn either as a closed or open circle, indicating whether that endpoint is included or excluded from that segment.
example in attached file along with blank grid