Results 1 to 2 of 2

Thread: Please help!

  1. #1
    Member princess_anna57's Avatar
    Jul 2007

    Please help!

    Sketch y = x(4 - x) for x that is equal to or less than 0. Explain in words what happens to the slope of the curve as we move along it from left to right.
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Behold, the power of SARDINES!
    TheEmptySet's Avatar
    Feb 2008
    Yuma, AZ, USA

    Make a table of values...

    Since we are making a graph we can pick any values of x that we wish...

    Since they ask us pick pick values less than or equal to zero that is a good place to start.

    so lets start with x = 0, x= -1, x = -2, x = -3

    $\displaystyle y=x(4-x)$

    evaluating at the above values

    $\displaystyle y=0(4-0)=0$ gives the point $\displaystyle (0,0)$

    $\displaystyle y=-1(4-(-1)=0$ gives the point $\displaystyle (-1,-5)$

    $\displaystyle y=-2(4-(-2))=0$ gives the point $\displaystyle (-2,-12)$

    $\displaystyle y=-3(4-(-3))=0$ gives the point $\displaystyle (-3,-21)$

    if we plot these ordered pairs and connect them with a smooth curve we should be able to answer the question.
    Follow Math Help Forum on Facebook and Google+

/mathhelpforum @mathhelpforum