take a vertical line, if another line intersects that vertical line at 2 points, then it is a function.In other words,a graph represents a function if each vertical line meets its graph in a unique point.
Chat with our AI personalities
If the graph is a function, no line perpendicular to the X-axis can intersect the graph at more than one point.
A derivative of a function represents that equation's slope at any given point on its graph.
A sliding test. The vertical line can meet the graph at at most one point.
No, a circle graph is never a function.
If for every point on the horizontal axis, the graph has one and only one point corresponding to the vertical axis; then it represents a function. Functions can not have discontinuities along the horizontal axis. Functions must return unambiguous deterministic results.