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Slope of Tanget line and Equation?
Did i get the correct answer? 1 - 2x^2 at x = -1
for the slope of the line i came up with -2 and for the equation i have y= -2x - 3
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- 9 years agoFavorite Answer
y = 1 - 2x²
y(-1) = 1 - 2(-1)² = 1 - 2 = -1
This means you use the point (-1, -1).
y' = -4x
y'(-1) = -4(-1) = 4
This means the slope of the tangent line is 4.
Using the point-slope formula,
y - (-1) = 4(x - (-1))
y + 1 = 4(x + 1)
y = 4x + 3
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