Find derivative of 3x^2+4 using limits

The derivative of a function f(x) is defined as

For f(x) = 3x ² + 4, we have

the slope of the line is 60

one point on the line is (40,10)

step-by-step explanation:

in the equation outside the parenthesis the equation always tells you the slope. in this case it is 60.

in the parenthesis is also says 40 which is x because it is near the x and 10 is y because it is near y.