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Plot a linear or quadratic function with a value table and adjustable window.
Practice functions →Enter coefficients a, b, and c for y = ax² + bx + c, using a = 0 for a straight line. Choose an axis bound from 1 to 100 and press Draw graph; both axes use that bound, and the value table samples five x-values spread across the same window.
The calculator substitutes each x into the polynomial to get y and plots sampled points within the square viewing window. Nonzero a produces a parabola; a = 0 produces a line, and a = b = 0 gives a horizontal line. The table evaluates the formula at five x-values spread evenly across the same window — −bound, −bound/2, 0, bound/2, and bound — so every row can be found on the graph.
Enter a = 1, b = 0, c = −4 with bound 10. The table samples x = −10, −5, 0, 5, 10 and gives y = 96, 21, −4, 21, 96. The curve has vertex (0, −4) and crosses the x-axis at −2 and 2.
Enter a = 0, b = 2, c = 3 with bound 10. The function is y = 2x + 3, so the same five x-values give y = −17, −7, 3, 13, 23. Its y-intercept is 3 and its slope is 2.
No. This tool supports only a polynomial of degree at most two entered as three coefficients. Use the General Calculator for individual scientific function values, not their graphs.
Only points within the chosen x and y bounds are drawn. Increase the bound or adjust the coefficients if the curve lies outside the window; a blank window does not mean the function has no values.
Five x-values spread evenly across your chosen window: −bound, −bound/2, 0, bound/2, and bound. Every row is therefore a point you can find on the graph, and changing the bound samples different points.
It does not automatically report roots or intersections. Use the Quadratic Equation Solver to solve ax² + bx + c = 0. Coefficients here are limited to between −1000000 and 1000000.
Use the quadratic solver for roots and the linear solver for equations rather than estimating answers from the picture. The functions lesson explains inputs, outputs, and how a table connects to a graph. Related tools: Quadratic Equation Solver, Linear Equation Solver. Read the Functions & Domain/Range lesson or practice functions & domain/range to build confidence without relying on a calculator.