SAT Math · Chapter Test
Function Concepts — 25-Question Test
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Formula Reference Sheet
This chapter
Notation & evaluation
| Function notation | f(x) = … ; f(a) is the output at x = a |
|---|---|
| Evaluate | substitute the input for x |
Domain & range
| Domain | allowed inputs (x-values) |
|---|---|
| Range | possible outputs (y-values) |
| Restrictions | no division by 0; no √ of a negative |
Digital SAT reference
Area & Circumference
| Circle area | A = πr² |
|---|---|
| Circle circumference | C = 2πr |
| Rectangle | A = ℓw |
| Triangle | A = ½ b h |
Volume
| Rectangular box | V = ℓwh |
|---|---|
| Cylinder | V = πr²h |
| Sphere | V = 4⁄3 πr³ |
| Cone | V = 1⁄3 πr²h |
| Pyramid | V = 1⁄3 ℓwh |
Right triangles
| Pythagorean theorem | a² + b² = c² |
|---|---|
| 30°–60°–90° | sides x : x√3 : 2x |
| 45°–45°–90° | sides s : s : s√2 |
Constants
| Degrees in a circle | 360° |
|---|---|
| Radians in a circle | 2π |
| Angles of a triangle | sum = 180° |
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