Here are the steps put it into y=mx+b 4y=-5x+20 to isolate y divide both sides by y=-5/4+5 to find the xi xi is when y=0 so plug it in to the equation 4y=-5x+20 4(0)=-5x+20 0=-5x+20 subtract 20 from each side -20=-5x the negatives cancel out 20=5x to isolate x divide each side by 5 x=20/5 20/5=4 Answers: m=-5/4 yi=5 xi=4
