For the function f(x)=9x3-x, make a table of slopes of secant lines and make a conjecture about the slope of t tangent line at x=1. Complete the table. (Round the final answer to three decimal places as needed. Round all intermediate values to four decimal placem needed.) Interval Slope of secant line [1,2] 62 [1.1.5] 41.75 [1.1.1] 28.79 26.27 26 [1, 1.01] [1, 1.001] An accurate conjecture for the slope of the tangent line at x=1 is (Round to the nearest integer as needed.)