What is the value of Y and Z respectively? 3/4=Y/6=15/Z​

The graph represents the gallons of water in a water tank with respect to the number of hours since it was completely filled

Triangle xyz has vertices x(1,3), y(0,0)

Which values of p and q result in an equation with exactly one solution? px-43=-42x+q choose all answers that apply: a) p=-43 and q=-43 b) p=42 and q=43 c) p=43 and q=−42 d) p=42 and q=42