kr1shna2003 kr1shna2003
  • 14-05-2016
  • Mathematics
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How does y=mx+c work

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penfila11Pen
penfila11Pen penfila11Pen
  • 14-05-2016
Ok so, y = mx + c is the equation of a line
When a graph is written in this form, m is the slope/gradient and c is the y - intercept.
This form is needed when a question asks for the equation.
Lets say they give 2 sets of coordinates, we can use the point slope formula to find the slope (m)

point slope formula:
(y₂ - y₁) = m(x₂ - x₁)

Then we substitute any of the two set of coordinates to find c, the y - intercept. 

So the line has a gradient of m and y - intercept of c
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