a system of liner equations includes the line that is created by the equation y=x+3, graphed below and the line through the points (3,1) and (4,3). A.(-1,2) B.(1,3) C.(8,11) D.(9,12)
m=(y2-y1)/(x2-x1)= (3-1)/(4-3) =(2/1)= 2 y=mx+b. plug in one of the points for the second line and solve for b 1=2(3)+b 1=6+b -5=b plug b and m back into the equation y=mx+b y=2x+-5 The solution to the system must make sense when plugged into both equations C works because y=x+3; 11=8+3 11=11 and y=2x-5; 11=2(8)-5 11=11
