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