# Find the Tangent Line at the Point y=2x^3 , (-2,-16)

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Find and evaluate at and to find the slope of the tangent line at and .
Differentiate both sides of the equation.
The derivative of with respect to is .
Differentiate the right side of the equation.
Since is constant with respect to , the derivative of with respect to is .
Differentiate using the Power Rule which states that is where .
Multiply by .
Reform the equation by setting the left side equal to the right side.
Replace with .
Evaluate at and .
Replace the variable with in the expression.
Raise to the power of .
Multiply by .
Plug in the slope of the tangent line and the and values of the point into the pointslope formula .
Simplify.
The slope-intercept form is , where is the slope and is the y-intercept.
Rewrite in slope-intercept form.
Multiply by .
Simplify .
Multiply by .
Apply the distributive property.
Multiply by .
Move all terms not containing to the right side of the equation.
Subtract from both sides of the equation.
Subtract from .
Find the Tangent Line at the Point y=2x^3 , (-2,-16)