x/[(1+3x)^(1/2)-1] I'm wondering if it's even possible to imagine what a graph of this fxn would look like, or do you definitely need a graphing calc? When I plug it into a TI83, it ends up looking pretty linear and apparently doesn't exist when x < 0 ~Jules~ PS. sorry for how messy the eq'n looks, it's difficult to type. ... (1+3x) should be under a sqrt. sign.