📈 Graphing Calculator
Graph functions online, explore curves, compare equations and inspect y-values across an adjustable x-range.
Use x, ^, pi, e and functions such as sin(x), cos(x), sqrt(x), log(x), and ln(x).
About this calculator
This calculator is designed to provide clear, easy-to-understand results. Enter your values, review the results, and calculate again whenever you need to.
How to read a function graph
A graph shows the relationship between x-values and the corresponding y-values. The horizontal axis represents x and the vertical axis represents y. Where a curve crosses an axis, it can reveal an intercept; its direction and shape help show where a function rises, falls or changes direction.
Explore the graph with a useful x-range
Start with an x-range around zero, then narrow or widen it to inspect important features. A curve may look flat or disappear if the viewing range is too wide, while a narrow range can hide its overall behavior. For equations with asymptotes or rapid changes, inspect more than one range.
Examples of functions to try
Try a line such as y = 2x + 1, a parabola such as y = x² − 4, or a periodic function such as y = sin(x). Compare their shapes and use the graph as a visual aid alongside algebraic work.
Frequently asked questions
What does a graphing calculator do?
It plots a function on a coordinate plane so you can inspect its shape, intercepts, trends and changes.
How do I graph an equation?
Enter the function and adjust the x-range to explore the part of the curve you need. Check the expression and scale if the graph does not look as expected.