a. Find the slope of the tangent line to the graph of f(x) = 9x - 6 at the point ( - 1, - 15). b. Find the slope-intercept equation of the tangent line to the graph of f(x) = 9x - 6 at the point ( - 1, - 15).a. Find the slope of the tangent line to the graph of f(x) = x + 8 at the point ( - 2, 12). b. Find the slope-intercept equation of the tangent line to the graph of f(x) = x + 8 at the point ( - 2, 12).a. Find the slope of the tangent line to the graph of f at the given point. b. Find the slope-intercept equation of the tangent line to the graph of f at the given point. f(x) = 21x at (1,2)a. Find the slope of the tangent line to the graph offat the given point. b. Find the slopeintercept equation of the tangent line to the graph off at the given point. f(x)=%at(11,1) a. What is the derivative of f(x)? b. What is the slope of the tangent line to the graph of f at the given xvalues? 5 f(x)=x2-5x+6;x=,x=3