Quadratic function graph. Student says: 'I don't get what delta has to do with anything'.
Online whiteboard with graphs
Type f(x) = x² − 4x + 3 into the function generator to immediately plot the parabola and inspect roots and vertex, or sketch curves freehand on a grid. Students see updates and notes in real time.
Built-in function plotter and freehand annotations on one canvas.
Enter f(x) = x² − 4x + 3 — the board immediately generates a precise plot with roots at x = 1 and x = 3 and vertex at (2, −1). Right next to it, you pick up the marker to annotate calculations and highlight key points.
Combine mathematical plotting precision with whiteboard flexibility. Instead of pasting static screenshots from external tools, you adjust parameters live and explain steps directly on the canvas.
Visualizing coefficients and the discriminant
Show what a negative discriminant means geometrically. Adjust the constant term and the parabola shifts above the X-axis. Write next to it: 'no real roots'. The student immediately grasps the concept.
Connecting the algebraic formula b² − 4ac to the coordinate plane removes confusion: the curve never touches the X-axis, illustrating the algebraic property visually.
Hands-on student practice and board persistence
Hand the marker to the student to sketch or modify the next function. You correct signs and transformations live. After class, the entire session remains accessible via link.
Active problem solving on the board reinforces concepts better than passive viewing. The annotated graph serves as an accurate recap before exams.
“A ready-made graph from the textbook is a picture. A graph drawn on the board is understanding.”
Draw your first graph on a board
Create an account, open a board, and start drawing graphs together with the student.
Frequently asked questions
Yes. You can plot functions like f(x) = x² − 4x + 3, adjust domain and range, and draw freehand annotations, points, and tangent lines directly on the coordinate grid.
Yes. You can turn on the coordinate grid to guide freehand drawing, read coordinates accurately, and keep drawings to scale.
Yes. A free Basic account stores up to 10 permanent boards with standard PNG export. Pro offers unlimited boards, multi-page PDF export, and high-resolution PNG. Guest boards created without an account remain active for 7 days.
Yes. The plotter supports linear, quadratic, polynomial, and trigonometric functions (e.g., sin(x), cos(x)), alongside LaTeX formula rendering and freehand margin notes.