quadratic functions

U-shaped graph equations

A quadratic function is a polynomial function of degree two, producing a U-shaped curve called a parabola when graphed.

The standard form is ax² + bx + c, where a is nonzero.

Quadratic functions model trajectories, optimize areas, and appear throughout physics and economics: The ball's height follows a quadratic function of time.

algebra

polynomial

Expression with variable terms

roots · coefficients · solutions · trinomial · variable · inequality · complex numbers · binomial · standard form · real roots

parabola

conic

Tapering to apex

graphing · concavity · convexity · x-intercepts · y-intercept · zeros · curve · U-shape · focal length · conic section

vertex

maximum

Greatest permitted quantity

optimum · critical point · extremum · peak · trough · transformation · stretch · compression · reflection

applications

projectile motion

Parabolic path under gravity

ball toss · satellite dish · water fountain · physics · engineering · architecture · ballistics

graphing

coordinate plane

Two-axis graphing system

  • x-axisGraph's horizontal reference line
  • y-axisGraph's vertical reference
  • originStarting point or source

plotting · intercepts · symmetry · translation · dilation · transformation · domain · range · continuous · scale

Opposites
polynomial degree

quadratic functionslinear functions

Equations producing straight graphs

straight lines · linear equations · horizontal lines · vertical lines · lines

function type/complexity

quadratic functionsexponential functions

Equations with variable exponents

trigonometric functions

Family

quadratic, quadrat, quadrature, quadrant, quad, square, squared, squaring, squares

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Used worldwide · Timeless · Abstract · Rated G