Consider the following sample regression equation: hat$(y)=8+5x_1+3x_2,$ interpret the value $5$

For a unit increase in $y,$ the average value of $x_1$ increases by $5$ units, holding $x_2,$ constant

For a unit increase in $x_1,$ the average value of $y$ increases by $5$ units, holding $x_2,$ constant

For a unit increase in $x_1,$ the average value of $y$ decreases by $5$ units, holding $x_2,$ constant

For a unit increase in $y,$ the average value of $x_1$ decreases by $5$ units, holding $x_2,$ constant