document.write( "Question 162766: The directions say to match a function with its graph.
\n" ); document.write( "I think I can graph it on my own.
\n" ); document.write( "But I am completly confused with how to find out the coordinates. so that I can see which graph matches the function the best, so please help. (:

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\n" ); document.write( "\n" ); document.write( "the function is: f(x) = 3|x|
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Algebra.Com's Answer #119967 by gonzo(654)\"\" \"About 
You can put this solution on YOUR website!
if f(x) = x, then
\n" ); document.write( "f(3) = 3
\n" ); document.write( "f(5) = 5
\n" ); document.write( "you substitute the x with a value of x and solve.
\n" ); document.write( "in your problem,
\n" ); document.write( "f(x) = 3*|x|
\n" ); document.write( "set y = f(x) so the equation becomes y = 3*|x|.
\n" ); document.write( "now pick some x values and you'll get some y values.
\n" ); document.write( "example:
\n" ); document.write( "if x = 3, f(x) = y = 3 * |3| = 3 * (3) = 9
\n" ); document.write( "if x = 1, f(x) = y = 3 * |1| = 3 * (1) = 1
\n" ); document.write( "if x = 0, f(x) = y = 3 * |0| = 3 * (0) = 0
\n" ); document.write( "if x = -1, f(x) = y = 3 * |-1| = 3 * (1) = 1
\n" ); document.write( "if x = -3, f(x) = y = 3 * |-3| = 3 * (3) = 9
\n" ); document.write( "-----
\n" ); document.write( "whether x is negative or positive, the y value which is the same as f(x) will always be positive.
\n" ); document.write( "-----
\n" ); document.write( "plot points from x = -5 to x = + 5 at least and you'll see the shape of the curve.
\n" ); document.write( "you may already see it from the points already plotted here.\r
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