Select the correct answer from each drop-down menu. The slope of the line passing through the points (7,5) and (21, 15) is : 5/7 , 7/5 , 5 or 7 ?

{ Another line with a slope that is one-third that of the slope you just calculated passes through the origin and the point

pick one from these :

3,5
3,7
21,5
21,7 }