$1.$ X$-$axis:$$ Label the X$-$axis with numbers and the independent variable name including units. Try to use most of the figure $($i$.$e$.,$ spread out your numbers so they go most of the way across$).$

$2.$ Y$-$axis:$$ Label the Y$-$axis with numbers and the dependent variable name including units. Try to use most of the figure $($i$.$e$.,$ spread out your numbers so they go most of the way up$).$

$3.$ Do a scatter plot of your data from table $1.$ A scatter plot will show if your two data points at each light level are close together or far apart.

$4.$ Sketch a $$best fit$$ line between the data points, being sure the reader can still see every data point.

$2.$ Calculate column $4$ by subtraction $($Column $2-$Column $3).$ Column $3$ represents DO when no Elodea is added $($i$.$e$.,$ the DO of the original solution$).$

$3.$ Plot the $\backslash ($ X $\backslash )-$axis with Light Level $($column $1)$ and the $\backslash ($ Y $\backslash )-$axis with DO change $($column $4)$ in the Figure $1$ below. Two tips: $1)$ For the $\backslash ($ X $\backslash )-$axis, I would suggest every line representing $30$ units $(0-360).$ The light values are quantitative, so be sure $180$ is halfway between $0$ and $360\mathrm{.}2)$ For the $\backslash ($ Y $\backslash )-$axis, there are some negative values. I would suggest using units of $1\mathrm{.}5($i$.$e$.-3,\backslash (1\mathrm{.}5,0,1\mathrm{.}5,3\mathrm{.}0\backslash$ldots $\backslash ),$ so the values will run $-3$ to $15.$