Need help with this problem set and knowing how to do it please

SECTION 2.1 4. Points P = (1, 1) and Q = (x, y) are on the graph of the functionf (x) = x . Complete the following table with the appropriate values: y-coordinate of Q, the point Q = (x, y), and the slope of the secant line passing through points P and Q. Round your answer to eight significant digits. X y Q ( x, y) m sec 1.1 1.01 1.001 I 1.0001 a. Use the values in the right column of the table above, m , to guess the value of the slope of the tangent line to fat x = 1. b. Use the value in part a to find the equation of the tangent line at point P. Graph f(x) and the tangent line