Math Problem Statement
yがxに比例し、xの値が3ずつ増加するとき、yの値が2ずつ減少する。比例の式を求めよ。
Solution
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Math Problem Analysis
Mathematical Concepts
Proportionality
Linear Equations
Formulas
y = kx
k = Δy / Δx
Theorems
Direct Proportionality
Suitable Grade Level
Grades 8-10