f(x) = Vx+15, a = 1 (a) Use mtan = lim h - 0 f(a + h) - f(@) to find the slope of the tangent line mean = f'(a). h mtan (b) Find the equation of the tangent line to fat x = a. (Let x be the independent variable and y be the dependent variable.) Additional Materials Reading Submit Answer 6. [-/1 Points] DETAILS OSCALC1 3.1.018. MY Consider the function and the value of a. f ( x ) = - x - 1 , a = 3 h - 0 h (a) Use mean = lim (a + h) - r(@) to find the slope of the tangent line mtan = f'(a). mean = (b) Find the equation of the tangent line to fat x = a. (Let x be the independent variable and y be the dependent variable.)