Vector graph or chart of logarithmic function with formula y = log x, fx = ln x. Logarithm, inverse function to exponentiation. Mathematical operation, basic function. Graph with grid and coordinates.

Straight-line graphs of logarithmic and exponential functions Watch this video to learn about straight line graphs of logarithmic and exponential functions.

Below is the graph of a quadratic function, showing where the function is increasing and decreasing. If we draw in the tangents to the curve, you will notice that if the gradient of the tangent is ...