im going to assume it means you need to pick the one that has the coordinates for the place they intersect, and that would be (2.5, 0.5) x-axis comes first and y-axis comes second when writing coordinates.
That has a y intercept at y=-1. For every one block to the right we go three blocks up, so that's a slope of 3/1=3. So in slope-intercept form our equation is
Y=-2x-8+2 y=-2x-6 if x=0;Y=-6 IF y=0;x=-3 to plot the graph; plot point in -6 y-axis and -3 on the x-axis join them together then extend the line hope u understood