What is the equation of the graphed linear model?
y =
x +
Scatter plot on a first quadrant coordinate grid. The horizontal axis is labeled Variable M. The vertical axis is labeled Variable N. Points are plotted at (zero, one hundred), (five, one hundred ten), (ten, eighty), (fifteen, fifty), (twenty, seventy), (twenty, one hundred), (twenty-five, sixty), (thirty, twenty), (thirty, seventy-five), (thirty-five, sixty-five), (forty, forty), (forty-five, ten). A line is drawn through (twenty, seventy) and (twenty-five, sixty).