Tables and regression

When a question gives a table of values, Desmos can find the equation that fits it.

Example: the lists $x_1 = [1, 2, 3, 4, 5]$ and $y_1 = [3, 5, 7, 9, 11]$ can be entered with the regression $y_1 \sim m x_1 + b$. Desmos reports $m = 2$ and $b = 1$, so the data fits $y = 2x + 1$ exactly.

• Type ~ (tilde) for a regression. Use $a \cdot b^{x_1}$ for exponential data or $a x_1^2 + b x_1 + c$ for quadratic data.
• You can also add a table from the + menu and type the values in.

On the test: "which equation models the data in the table?" Run the regression and match the coefficients to the choices.