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📋 Formula sheet

All formulas with illustrations — print and hang on the wall!

All 📐 Geometry 🔢 Numbers and algebra 〰️ Functions ∫ Calculus 📊 Statistics 🔷 Vectors

〰️ Functions

Linear function

f(x) = ax + b
a=slope, b=y-intercept
ba=Δy/Δx
a = (y₂-y₁) / (x₂-x₁)
Slope formula

Quadratic function

f(x) = ax² + bx + c
Parabola
toppnullpunkter
x = -b / (2a)
Vertex x
x = (-b ± √(b²-4ac)) / (2a)
Quadratic formula
D = b² - 4ac
Discriminant

Exponential function

f(x) = a · bˣ
Growth/decay
ab>1: vekst
e ≈ 2.71828
Euler's number