start with the parent function of y=x
you have a horizontal shift of +2.5, slope or stretch factor of 2 and vertical shift of 3. So instead of starting at (0,0) you start at(2.5,3). since your slope is 2 you could plot a few additional points (3.5,5) (1.5,1) so you could visualize this line
Finally since this is -f(x) you have to reflect this over the x axis . When you do this your x values stay the same but the y values become negative so your points are (1.5,-1) (2.5,-3) and (3.5,-5)
