<p>If y= f(x) = x/(1+x), consider the points (1, .5) and (3, .75) which lie on the graph of this function.</p>
<p>A. Calculate the slope of the secant line when x=1.01
B. If the slope of the tangent line to the curve at x=1 is .25, what is the equation of this tangent line?</p>