A line that includes the point ( - 4, - 1) has a slope of - 2. What is its equation in point-slope form?
2 answers:
Point-Slope equation: y - y₁ = m(x - x₁) ; m is slope and (x₁ ,y₁) is the coordinate
y - (-1) = -2(x - (-4)
y + 1 = -2(x + 4) <em>simplified (two negatives make a positive)</em>
Point slope form says the line through (a,b) with slope m is
y - b = m(x - a)
Here that's
y - - 1 = -2(x - -4)
Answer: y + 1 = -2(x + 4)
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