Find an equation of the line that passes through the point and has the indicated slope m. (2, −1); m = −1
You can use the point-slope form and simplify the resulting equation.
Let \(L\) be a straight line with slope \(m \)passing through \((x_0, y_0)\).
Then the equation of \(L\) is \(y - y_0 = m(x - x_0)\).
Can you take it from here?