Using the app

Plot data and find a line of best fit on the graph canvas

Enter data in a table, plot the points, and fit a line or curve with a regression that shows R².

Open in Trident

1. Tap + Add and choose Table. A table with columns x₁ and y₁ appears.
2. Type your data. A new row appears when you fill the last one. The points are drawn as you type.
3. Drag a point on the graph to change its value in the table.
4. Tap the small line button in a column heading to connect its points.
5. For a regression, type it on a new line with a ~ (tilde): y_1 ~ m x_1 + b for a line, y_1 ~ a x_1^2 + b x_1 + c for a parabola, or y_1 ~ a b^{x_1} for an exponential.
6. The best values of the letters appear under the line, with R². The fitted curve is drawn over your points, and the letters can be used in other lines.
7. A column heading can also be a formula of the first column, such as x_1^2, to compute values.

Tips

• Lists from tables work in other lines too: mean(x_1), stdev(y_1), total(y_1).

Related guides

• Graph equations by typing them (graph canvas)Open the graph canvas, type equations the way they are written in your textbook, and watch them drawn as you type.
• Share a graph or make a match-the-graph challengeSend a graph as a link or QR code, and make challenges where students type equations to match a hidden graph.