Browse · MATH Print → jmc algebra intermediate Problem A line goes through point A(9,1), point B(19,k) and point C(7,0). What is the value of k? Solution — click to reveal The slope of the line is 9−71−0=21, so 19−9k−1=21, or k−1=210 and k=6. Final answer 6 ← Previous problem Next problem →