<PRE><B>Question 98817</B>
plugging in the points gives 3A-B=1 and -4A-2B=1


multiplying the first equation by -2 gives -6A+2B=-2 ... adding this to the second equation gives -10A=-1 ... A=.1


3(.1)-B=1 ... .3-1=B ... -.7=B


.1x-.7y=1 ... -.7y=-.1x+1 ... y=(1/7)x-(1/.7) ... y=mx+b ... slope is 1/7 and y-intercept is -10/7</PRE>