The Greatest Common Factor: G C F ( 45, 90 , 75 ) = 15 The greatest number of stones Marco can make is 15. 45 : 15 = 3 90 : 15 = 6 75 : 15 = 5 He will use: 3 red, 6 blue and 5 yellow tiles in each stone.
The answer is B. Because it says vertical line so it can’t be y. (Y would be a horizontal line.) Then -4 matches the x value of the expression given and if you plot it on a graph -4 passes though the given point.