Writing Exponential Equations from Graphs

Point A is a point on the graph. Point C is the y-intercept. Point B controls the asymptote.

Drag these three points around. As long as point A and point C are on the same side of the asymptote, there will be a graph.

What is the equation of the graph? When you think you know it, type your equation into the INPUT line and see if your graph matches up with the graph in the sketch! Use ^ for the exponent.

Example: Type in 2*(3^(-x))+1.

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Steve Phelps, Created with GeoGebra