i think it’s y=1/4x bc if you plug it into the equation:
x= 2 cups of flour
y = 1/2 cups of sugar
the equation: y=1/4x
1/2=1/4(2)
1/2 = 1/2 which makes the equation true, or just plug in the numbers to the equation to see if it’s fits right
final: y=1/4x
i hope this helped