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Question 294626: find an equation of the line containing the given pair of points. (-1,-3)and(-4,-7)
Answer by nerdybill(7384)   (Show Source):
You can put this solution on YOUR website! find an equation of the line containing the given pair of points. (-1,-3)and(-4,-7)
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First, determine the slope:
m = (y2-y1)/(x2-x1)
m = (-7-(-3))/(-4-(-1))
m = (-7+3)/(-4+1)
m = (-4)/(-3)
m = 4/3
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Plug one of the given points (-1,-3) and the slope above (4/3) into the "point-slope" form:
y-y1 = m(x-x1)
y-(-3) = (4/3)(x-(-1))
y+3 = (4/3)(x+1)
y+3 = (4/3)x + (4/3)
y = (4/3)x + (4/3) - 3
y = (4/3)x + (4/3) - 9/3
y = (4/3)x - 5/3 (this is what they're looking for)
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