line

Find an equation of the line passing through the pair of points (4.9) and (3,5). Write the equation in the form

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$m=\dfrac{y_2-y_1}{x_2-x_1}=\dfrac{5-9}{3-4}$

$m=4$

$y=m(x-x_1)+y_1$

$y=4(x-4)+9=4x-16+9$

$y=4x-7$

$Ax + By = C\\ corresponds\\ 4x-y=7$

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