y = mx + c?

Hi,

I need some help on some maths questions for revision. The first question I am stuck on is as follows:

y = 4x - 3

a) Find the gradient

b) Find the y intercept

I know the answer to B is -3 but am not sure about question A.

Any help would be appreciated.

Thanks.

10 Answers

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  • 1 decade ago
    Favorite Answer

    gradient would mean like the slope or the rate at which the line increases. if it is, the gradient is 4

  • 1 decade ago

    In slope intercept form, which your equation is, the first number is the slope -gradient- and the second number is the Y intercept. The slope, or gradient, is 4. In this case the slope is positive since the 4 is positive.

    Source(s): High School mathematics. It's probably 8th grade by now though..
  • 1 decade ago

    the gradient is 4, y=mx +c now forget about the plus c, and concentrate on the y=mx in your equation y=4x-3

    so the gradient is 4 . in the example

    y = 15x- 10000000000 the gradient is 15

    as for the x intercept I have not read that part yet

  • 1 decade ago

    m = gradient.

    C = y intercept

    y = mx + c

    y = (4)x + (-3)

    Hence the gradient is 4 and y intercept is -3.

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  • Anonymous
    1 decade ago

    y=mx+c is the eq. wich represents da graph of a str8 line.

    m=slope=gradient=4

  • 1 decade ago

    gradient is nothing but slope

    when equation is given slope is m

    Hence slope for ur equation is 4

  • 1 decade ago

    in that eqn the gradient is represented by m so in this case it is 4 ur right with B too

  • 1 decade ago

    y = mx + c, where m= gradient and c= y intercept.

    So, c = y intercept = -3 [you are right!!]

    m = gradient = 4

    Isn't it easy !

  • 1 decade ago

    answer 2 question A is 4...gradient is slope..dy/dx...if u r stil confused...differsntiate the expression wrt x n u get dy/dx=4

  • 1 decade ago

    gradient = slope, so the answer to a) is 4.

    that's it! :)

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