Question 238413
Find two points.
First let x=0, y=-2(0)-1=-1, graph (0,-1).
Then let y=0, 0=-2x-1, 2x=-1, x=-1/2, graph (-1/2,0).
Connect the points with the line.
{{{drawing( 300, 300, -3, 3, -3, 3,grid( 1 ),green(circle( 0, -1, .15 )),green(circle(-0.5,0,.15)), graph( 300, 300, -3, 3, -3, 3, -2x-1)))}}}