How do we solve this?

We can just plug the co-ordinates into the equation:

y = mx+ c

So substituting gives us:

(1) = 4 (-5) + c

:. (1) = -20 + c.

Solve for c: (add 20 to both sides)

Therefore c = 21

This gives us the complete equation:

Y = 4X + 21

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Husain Mukadam
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3 years ago


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