Roni wants to write an equation to represent a proportional relationship that has a constant of proportionality equal to StartFraction 7 over 25 EndFraction. She writes the equation y = x + StartFraction 7 over 25 EndFraction. What error is Roni making?

Answer 1

any proportional relationship can be modeled by
y = kx
for some constant k.
So here you need y = 7/25 x

Why not just write the fractions, instead of dictating all those obfuscating words?