Answer:
The value of y is 9/2 units.
Thae scale factor is 3/4.
Explanation:
4 : 3 = x : y
4 : 3 = 6 : y
4/3 = 6/y
y = (6 × 3)/4
y 18/4
y = 9/2
y is 9/2 units
scale factor = scaled side ÷ original side
scale factor = 3 ÷ 4 or 6 ÷ 9/2
scale factor = 3/4