Need two points. m = slope.
(X1, Y1) and (X2, Y2)
m = Y2 - Y1/X2 - X1
==============Or, if function is in this form......
Y =mX + b
========
Read off of function, or get function is this form.
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If you want to find the initial value of an exponential, which point would you find on the graph?
A line. The derivative of a function is its slope. If the slope is a constant then the graph is a line.
A derivative graph tracks the slope of a function.
When you take the derivative of a function, you are seeking a variation of that function that provides you with the slope of the tangent (instantaneous slope) at any value of (x). For example, the derivative of the function f(x)=x^2 is f'(x)=2x. Notice that the derivative is denoted by the apostrophe inside the f and (x). Also note that at x=0, f'(x)=0, which means that at x=0 the slope of the tangent is zero, which is correct for the function y=x^2.
A derivative of a function represents that equation's slope at any given point on its graph.