Direct Variation Formula Explained
When two quantities scale proportionally together:
STEP 01
Identify x₁ and y₁
Enter a known coordinate pair (x₁, y₁) from the problem statement.
STEP 02
Compute Constant k
Calculate constant of proportionality k = y₁ / x₁.
STEP 03
Form Equation
Write the linear equation y = kx passing through origin (0, 0).
STEP 04
Predict Values
Multiply target x₂ by k to find unknown corresponding y₂.