Answer: No it would have to be y=160x
Step-by-step explanation: Y=150x would model if the factory makes 600 brushes in 4 hours, but we have 640 so you take the leftover 40 divide it by 4 because that's how many groups we have, and that's 10 add the ten to the equation you get y=160x. Hopefully next time you will understand it! ;) Hope this helped ya!