It is a function. If the graph contains at least two points on the same vertical line, then it is not a function. This is called the vertical line test.
Chat with our AI personalities
what graph uses symbols to represent amounts
That is a result of an absolute value equation. So an Absolute Value Graph
Nothing particular. The graph of y = x2, for example, changes slope at each point on the graph.
It is a straight line because the equation is a linear expression in x.
A tangent line is NEVER vertical to a function. It is vertical to the normal to the function - which is as far from vertical as you can get!The graph of a function, f(x) can have a tangent at a point. Let's call the point (x0,f(x0)). If f'(x) goes to positive infinity or f'(x) goes to negative infinity as x approaches x0 then f(x) has a vertical tangent at that point.