A multiple regression includes two regressors:

$Y_i={}_0+{}_1{x}_{1i}+{}_2{x}_{2i}+u_i$

Use the tool palette to the right to answer the following questions.

What is the expected change in $Y$ if $x_1$ increases by $4$ units and $x_2$ is unchanged?

The expected change in $Y$ if $x_1$ increases by $4$ units and $x_2$ is unchanged is subscript can be created with the $\_$ character.$)$

$($Properly format your expression using the tools in the palette. Hover over tools to see keyboard shortcuts. Eg$.,$ a

What is the expected change in $Y$ if $x_2$ decreases by $9$ units and $x_1$ is unchanged?

The expected change in $Y$ if $x_2$ decreases by $9$ units and $x_1$ is unchanged is $($Properly format your expression using the tools in the palette.$)$

What is the expected change in $Y$ if $x_1$ increases by $3$ units and $x_2$ decreases by $7$ units?

The expected change in $Y$ if $x_1$ increases by $3$ units and $x_2$ decreases by $7$ units is $q,($Properly format your expression using the tools in the palette.$)$