Question

What is the equation for straight line

Answer 1

the general equation for a straight line is (y=mx+c) where m is a gradient , y=c is the value where the line cuts the y-axis . The number c is called the intercept on the y-axis

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Answer 2

There are various forms of equation to a straight line.

★ Slope intercept form. y = mx + c

★ Slope point form. y-y1 = m(x2–x1)

★ Two point form. (y-y1)/(x-x1) = (y2- y1)/(x2–x1)

★ Intercept form. x/a + y/b =1

★ Normal form. x cos alpha + y sin alpha = p

★ General form ax + by + c = 0.


Each formula is used depending on what is given in a problem.


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