Nonlinear Functions on the Digital SAT: the Desmos Method
On a curve, the answer is a point you can click. Type the function into Desmos, click the vertex or the crossing, and read the coordinate the question actually asked for.
Advanced Math·65 practice problems in DesPrep
The Nonlinear Functions lesson is part of DesPrep
It is one of the 17 full lessons inside the subscription — 7 sections that take nonlinear functions from first principles to the fastest Desmos route, with a worked example on every one:
- Almost every one of these is a vertex
- Typing it so Desmos reads what you meant
- Function values without substituting
- Height, time, and how long it stays up
- When the unknown is the constant
- When they hand you the vertex
- Growth factors: put the unknown on the x-axis
Then 65 practice problems on this skill alone, solved inside a live Desmos calculator with step feedback and an expert replay on every one.