Question:
Can you find the gradient of a curved line? If yes, how?-
is it just the same as for a straight line of best fit?

Replies:
The gradient (i.e. slope) of a curve can be calculated using calculus. In
fact that is one of its major uses. Just "how" to do it without knowing any
calculus is not easy to do in a few words. You can look up values of the
"derivatives" of various functions in a math handbook or calculus text. If
you evaluate the derivative at the point of interest that is the slope of
that function at that point. For example, let f(x)= x^2.
The derivative of this f'(x) = 2*x. So the slope at x=0 is f'(0)=0; at x=1
then f'(1)=1; the slope at x=2 is f'(2)=4 and so on.

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