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Defines a CSS class in the preamble which styles the "Lemma" environment, used in the statement.

Adding several rational functions.

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Pick from the range -5..5, but make 0 more likely.

Call a custom function from another javascript custom function by using scope.evaluate

Give the student three points lying on a quadratic, and ask them to find the roots.

Then ask them to find the equation of the quadratic, using their roots. Error in calculating the roots is carried forward.

Finally, ask them to find the midpoint of the roots (just for fun). Error is carried forward again.

Two sample t-test to see if there is a difference between scores on questions between two groups when the questions are asked in a different order.

Gitt vektorene  $\boldsymbol{A,\;B}$, finn vinkelen mellom dem.

Differentiation