What is the equation of the line between $(-3,3)$ and $(-4,1)$ ?

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Answer 1 · 2016-03-13T12:23:17

$y=2x+9$

$P_1=(x_1-y_1)" "P_2=(x_2,y_2)$

$x_1=-3$
$y_1=3$
$x_2=-4$
$y_2=1$

$(y_2-y_1)/(x_2-x_1)=(y-y_2)/(x-x_2)$
$(1-3)/(-4+3)=(y-1)/(x+4)$
$2/1=(y-1)/(x+4)$
$y-1=2(x+4)$
$y=1+2x+8$
$y=2x+9$

What is the equation of the line between (-3,3)(-3,3) and (-4,1)(-4,1)?