1 Answer | Add Yours
Take the derivative of the function.
`y' = 8x^3`
Substitute the x value of the given point.
`y'(1) = 8(1)^3 = 8`
The derivative, or slope, at point (1,-1) is eight.
Check by graphing the derivative function y'.
We’ve answered 319,631 questions. We can answer yours, too.Ask a question