Find the equation of the line which passes through (-2,-2) and (2,-4).
2 answers:
Equation of a line is given by
m (x - x¹) = (y - y¹)
- where m is the gradient

where (x¹ , y¹ ) and (x² , y²)
(-2,-2 ) and (2 , -4)
- m = ( -4 - (-1) ) ÷ ( 2 - (-2) )
- m = ( -4 + 1 ) ÷ ( 2 + 2 )
- m = ( -3 ) ÷ ( 4 )

but equation of a line is given by
m (x - x¹) = ( y - y¹)


- expanding the bracket
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