The Desmos Series
The Digital SAT hands you a graphing calculator for the entire Math section, and almost nobody uses it properly. Each episode takes a real question type and solves it visually — in about fifteen seconds instead of ninety.
13 episodes · 25:28 total
2:23Episode 1
Solve any equation without solving it
Nonlinear Equations in 1 Variable and Systems of Equations in 2 Variables
2:20Episode 2
Make Desmos try all four answers for you
Nonlinear Equations in 1 Variable and Systems of Equations in 2 Variables
1:59Episode 3
Never complete the square again
Circles
1:58Episode 4
Shade it and the answer shows up
Linear Inequalities in 1 or 2 Variables
1:49Episode 5
The vertex is just a point — click it
Nonlinear Functions
2:25Episode 6
Slide until the lines are parallel
Systems of 2 Linear Equations in 2 Variables
1:59Episode 7
Never factor again — graph both and look
Equivalent Expressions
1:50Episode 8
Squaring both sides invents answers
Nonlinear Equations in 1 Variable and Systems of Equations in 2 Variables
1:46Episode 9
The list has a variable? Type it anyway
One-Variable Data: Distributions and Measures of Center and Spread
2:07Episode 10
Stop eyeballing the line of best fit
Two-Variable Data: Models and Scatterplots
1:37Episode 11
Doubles every 8 years? It is not 12.5%
Nonlinear Functions
1:41Episode 12
Equidistant? Type it as written
Coordinate Geometry
1:34Episode 13
A mystery k? Make it a slider
Nonlinear Functions