5 cups of strawberries
2 cups of bananas
5/2 = 2.5
2.5 cups of strawberries for every 1 cup of bananas
Where:
Strawberries = y-axis
Bananas = x-axis
Equation:
y= kx
Where k is the constant of proportionality:
Replace x,y by the coordinate point given (1,2.5) and solve for k
2.5 = k(1)
k= 2.5
Replacing:
y= 2.5 x