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Math Help - Gradient

  1. #1
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    Gradient

    Hello this is the question I am stuck on:

    The line joining (a,6) to (-3,5) has a gradient of 1. Determine the value of a.

    This this the process i used:

    1= (5-a)/(-3-6) then I rearanged it and got that a equals -4... But that is not the correct answer. How do I correctly work out the value of a?
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  2. #2
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    Quote Originally Posted by Paulo1913 View Post
    Hello this is the question I am stuck on:

    The line joining (a,6) to (-3,5) has a gradient of 1. Determine the value of a.

    This this the process i used:

    1= (5-a)/(-3-6) then I rearanged it and got that a equals -4... But that is not the correct answer. How do I correctly work out the value of a?
    1 = \frac{5 - 6}{-3 - a} .....

    You've used the formula incorrectly (do you see your mistakes?).
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  3. #3
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    Thanks.
    How do I rearange that? because I simplify it to -1/(-3-a)=1 but I don't know what to do next
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  4. #4
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    Quote Originally Posted by mr fantastic View Post
    1 = \frac{5 - 6}{-3 - a}

    [snip]
    \Rightarrow 1 = \frac{-1}{-3 - a} \Rightarrow 1 = \frac{1}{3 + a} \Rightarrow 1 = 3 + a .....
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