Easiest way to draw the graph is draw a line through two points on the graph. The intercepts are easiest to find, because we put x=0 into the line equation and solve for y to get the y intercept, and y=0 to get the x intercept.
When x=0, -2y-10=0 so y=-5; when y=0, 5x-10=0 so x=2. Draw a line through the intercepts (0,-5) and (2,0).
When y (the ordinate) is 5, x (the abscissa) is given by 5x-10-10=0, so 5x=20 and x=4. The point (4,5) lies on the line.