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Math Help - Function Graphing, Help needed!

  1. #1
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    Function Graphing, Help needed!

    Would someone kindly tell or show me how to determine a graph from these functions?

    1) y= (1/2)x
    2) f(x)= log x
    3) f(x)= log3x

    Much obliged.
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  2. #2
    is up to his old tricks again! Jhevon's Avatar
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    Quote Originally Posted by FactoringAnguish View Post
    Would someone kindly tell or show me how to determine a graph from these functions?

    1) y= (1/2)x
    this is just a straight line. it passes through the origin, find one other point it passes through, say (x,y) = (1,?) and then draw a straight line through the two points

    2) f(x)= log x
    ALL graphs of the form y = \log_a x look like the graph below. (it is asymptotic to the y-axis)

    3) f(x)= log3x
    is this f(x) = \log_3 x or f(x) = \log (3x)?
    Attached Thumbnails Attached Thumbnails Function Graphing, Help needed!-log.jpg  
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  3. #3
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    For number 3 its: f(x)= log3 x (the first one you posted)

    Thanks for the very quick response!
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  4. #4
    is up to his old tricks again! Jhevon's Avatar
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    Quote Originally Posted by FactoringAnguish View Post
    For number 3 its: f(x)= log3 x

    Thanks for the very quick response!
    well, it will look exactly like the graph from part 2, with exactly the same intercept. the only possible problem is, if you have to draw both on the same pair of axis, you'd have to know which to draw more steeply
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