X B 1. Ben said: For every $60 the sixth graders plan to raise, the seventh graders plan to raise $90. He looks at the principal's thermometers and sees that $60 is at the same place on the sixth-grade thermometer as $90 is on the seventh-grade thermometer. Ben also makes the claim: For every $30 the sixth graders plan to raise, the seventh graders plan to raise $45. Do you agree with this claim? Explain your reasoning.