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: Find the Percent Given Two Numbers

How To: Convert Fahrenheit to Celsius with a formula

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

How To: Convert improper fractions to mixed numbers quickly

How To: Convert between diameter and radius

How To: Find the Slope Given 2 Ordered Pairs

How To: Divide small numbers by big numbers

How To: Calculate Faster Than a Calculator

How To: Find Leg Lengths and Hypotenuse of a 45 45 90 Triangle

How To: Spend Money on a Graphing Calculator? Nah—Just Use This WebBased TI Emulator

How To: Write a slopeintercept equation given an XY table

How To: Subtract a mixed number from a proper fraction in basic math

How To: Calculate percent composition for chemistry

How To: Find a number given Its percent

How To: Find the slope of a line given 2 points with fractions

How To: Find extra points for a parabola (quadractic equation)

How To: Find a missing side of a triangle, similar to another

How To: Find the area & perimeter of triangles & squares
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