Secants to Tangents

Complete a table of values for the following functions
Change the value of a to get a new coordinate for B. Find a=2, 1.5, 1.3, 1.1 for each of the following functions and make a table of values.[br][br]f(x)=sin(x)[br]f(x)=[math]0.5x^2[/math][br]f(x)=[math]\sqrt{x}[/math][br]f(x)=[math]\sqrt{2-x^2}[/math][br][br]For each function, what does the slope appear to approach as a approaches 1?

Information: Secants to Tangents