You are estimating the cost of optical sensors based on the radius of the sensors. You decide to calculate the coefficient of determination (R²) as part of determining the goodness of fit of an equation. Using the preliminary calculations below, calculate the R² and determine its meaning. [Image Description: Summation of (Y_i Ybar)² = 147172 Summation of (Yhat Ybar)² = 129217 Summation of (Y Yhat))² = 17955]

12.20% of the variation in the cost is being explained by the radius.

87.80% of the variation in the radius is being explained by the cost.

87.80% of the variation in the cost is being explained by the radius.

12.20% of the variation in the radius is being explained by the cost.