# help with slope intercept

Find the equation of a line given the point and slope below. Arrange your answer in the form y = mx + b, where b is the constant.

(-1, 5)

m = -1

Answers

please respond

24 November 2012

y = mx + c

24 November 2012

The line equation is a formula for calculating every coordinate that lies on the line. So all we have to do is plug the x and y values given in the coordinate into the equation, as well as the gradient (m).

24 November 2012

therefore c = 4

24 November 2012

so 5 = (-1)*(-1) + c

24 November 2012

so the equation for the line in question is y = -1*x + 4. All we have done is substituted in known values for x and y that satisfy the equation, and used the given gradient to complete it.

24 November 2012

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