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

Question

Harvey

Mathematics

8 March, 05:05

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

+2

Answers (1)

Know the Answer?

Jonathan Pearson · Answer 1

Roni did not make use of the equation for a proportional relationship.

Step-by-step explanation:

For some constant of proportionality k, y is proportional to x if x and y satisfy the equation ...

y = kx

Roni knows k=7/25, but she did not use this equation. She added instead of multiplying, so did not end with an equation expressing a proportional relation.

___

y = (7/25) x