From Ramanujan to calculus cocreator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to autodidacts. And, thanks to the Internet, it's easier than ever to follow in their footsteps (or just study for that next big test). With this twopart installment from Internet pedagogical superstar Salman Khan's series of free math tutorials, you'll learn how to graph a rational function in collegelevel algebra.
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How To: Use ">" (greater than) and "<" (less than) symbols

How To: Remember "greater than" & "less than" symbols

How To: Do long division without a calculator

How To: Find the Percent Given Two Numbers

How To: Calculate Faster Than a Calculator

How To: Write a slopeintercept equation given an XY table

How To: Find a number given Its percent

How To: Calculate the area of a parallelogram

How To: Divide small numbers by big numbers

How To: Find a slope of a straight line with: Ax + By + C = 0

How To: Find the equation of an ellipse given a graph

How To: Find the Volume of Composite Figures (Also Called Composite Shapes)

How To: Calculate percent composition for chemistry

How To: Find the area of a circle when you know the diameter

How To: Find the Radius of a Circle from Arc Length

How To: Find the equation of a line given 1 point

How To: Simplify surds (improper square roots)

How To: Handle missing terms in algebraic long division

How To: Factor a trinomial, find the GCF, then group

How To: Find the area of a parallelogram using geometry
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