The slope of the tangent line to f(x) at x = a can be found by evaluating the limit mean = lim(f(a + h) - f(a))/h provided the limit h +0 exists. If using decimal approximations, round all values to within six decimal places. Given f(x) = va + 8 , find the slope of the tangent line to f(x) at x = -6 using the above definition. Then find the equation of the tangent line to f(x) at x = -6. a. mtan = b. The equation of the tangent line to f(x) at x = -6 in slope intercept form is y =