Complete the conjecture. "The number of lines formed by 4 points, no three of which are collinear is ."

Determine domain and range, largest open interval, and intervals which function is continuous.

Aclassmate thinks that solving a system by graphing gives an exact answer when the lines appear to cross at a grid point, but only an approximate answer when they don't. explain why this isn't true.

Bc and bd are opposite rays. all of the following are true except a)a,b,c,d are collinear b)a,b,c,d are coplanar c)bc=bd d)b is between c and d