In reference to the equation $\hat { y } = - 0.80 + 0.12 x _ { 1 } + 0.08 x _ { 2 }$ , the value 0.12 is the average change in y per unit change in x₁, when x₂ is held constant.

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The coefficient 0.12 represents the partial derivative of $\hat{y}$ with respect to $x_1$, indicating the average change in $\hat{y}$ for a one-unit increase in $x_1$ while holding $x_2$ constant.

In Reference to the Equation y^=−0.80+0.12x1+0.08x2\hat { y } = - 0.80 + 0.12 x _ { 1 } + 0.08 x _ { 2 }y^​=−0.80+0.12x1​+0.08x2​

In Reference to the Equation $\hat { y } = - 0.80 + 0.12 x _ { 1 } + 0.08 x _ { 2 }$