	Algebra Tutorials!

	Thursday 21st of November



	Home
	Scientific Notation
	Notation and Symbols
	Linear Equations and Inequalities in One Variable
	Graphing Equations in Three Variables
	What the Standard Form of a Quadratic can tell you about the graph
	Simplifying Radical Expressions Containing One Term
	Adding and Subtracting Fractions
	Multiplying Radical Expressions
	Adding and Subtracting Fractions
	Multiplying and Dividing With Square Roots
	Graphing Linear Inequalities
	Absolute Value Function
	Real Numbers and the Real Line
	Monomial Factors
	Raising an Exponential Expression to a Power
	Rational Exponents
	Multiplying Two Fractions Whose Numerators Are Both 1
	Multiplying Rational Expressions
	Building Up the Denominator
	Adding and Subtracting Decimals
	Solving Quadratic Equations
	Scientific Notation
	Like Radical Terms
	Graphing Parabolas
	Subtracting Reverses
	Solving Linear Equations
	Dividing Rational Expressions
	Complex Numbers
	Solving Linear Inequalities
	Working with Fractions
	Graphing Linear Equations
	Simplifying Expressions That Contain Negative Exponents
	Rationalizing the Denominator
	Decimals
	Estimating Sums and Differences of Mixed Numbers
	Algebraic Fractions
	Simplifying Rational Expressions
	Linear Equations
	Dividing Complex Numbers
	Simplifying Square Roots That Contain Variables
	Simplifying Radicals Involving Variables
	Compound Inequalities
	Factoring Special Quadratic Polynomials
	Simplifying Complex Fractions
	Rules for Exponents
	Finding Logarithms
	Multiplying Polynomials
	Using Coordinates to Find Slope
	Variables and Expressions
	Dividing Radicals
	Using Proportions and Cross
	Solving Equations with Radicals and Exponents
	Natural Logs
	The Addition Method
	Equations

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Graphing Parabolas

Standard form for a Quadratic Equation:

y = ax + bx + c, where a 0

Terms:

Parabola: U-shaped graph formed by quadratic functions.

Quadratic Term: ax

Concave Upward: a parabola that opens upward (coefficient is positive)

Concave Downward: a parabola that opens downward (coefficient is neg)

Vertex of a parabola: the highest point on a concave down parabola or lowest point on a concave up parabola.

Axis of symmetry: the vertical line that passes through vertex in a parabola.

The effects of coefficients on a quadratic system:

If a > 0 then the graph is concave upward.

If a > 0 then the graph is concave downward.

If |a| > 1 then the graph is narrower then when a = 1.

If |a| < 1 then the graph is wider then when a = 1.

c is the y -coordinate of the y -intercept of the graph.

the x -coordinate of the vertex is

The axis of symmetry is the line graphed by