Question 173972
Do you want to graph? Please post <b>full</b> instructions.





Looking at {{{y=x-15}}} we can see that the equation is in slope-intercept form {{{y=mx+b}}} where the slope is {{{m=1}}} and the y-intercept is {{{b=-15}}} 



Since {{{b=-15}}} this tells us that the y-intercept is *[Tex \LARGE \left(0,-15\right)].Remember the y-intercept is the point where the graph intersects with the y-axis


So we have one point *[Tex \LARGE \left(0,-15\right)]


{{{drawing(500,500,-10,10,-17,3,
  grid(1),
  blue(circle(0,-15,.1)),
  blue(circle(0,-15,.12)),
  blue(circle(0,-15,.15))
)}}}



Now since the slope is comprised of the "rise" over the "run" this means

{{{slope=rise/run}}}


Also, because the slope is {{{1}}}, this means:


{{{rise/run=1/1}}}



which shows us that the rise is 1 and the run is 1. This means that to go from point to point, we can go up 1  and over 1




So starting at *[Tex \LARGE \left(0,-15\right)], go up 1 unit 

{{{drawing(500,500,-10,10,-17,3,
  grid(1),
  blue(circle(0,-15,.1)),
  blue(circle(0,-15,.12)),
  blue(circle(0,-15,.15)),
  blue(arc(0,-15+(1/2),2,1,90,270))
)}}}


and to the right 1 unit to get to the next point *[Tex \LARGE \left(1,-14\right)]

{{{drawing(500,500,-10,10,-17,3,
  grid(1),
  blue(circle(0,-15,.1)),
  blue(circle(0,-15,.12)),
  blue(circle(0,-15,.15)),
  blue(circle(1,-14,.15,1.5)),
  blue(circle(1,-14,.1,1.5)),
  blue(arc(0,-15+(1/2),2,1,90,270)),
  blue(arc((1/2),-14,1,2, 180,360))
)}}}



Now draw a line through these points to graph {{{y=x-15}}}


{{{drawing(500,500,-10,10,-17,3,
  grid(1),
  graph(500,500,-10,10,-17,3,x-15),
  blue(circle(0,-15,.1)),
  blue(circle(0,-15,.12)),
  blue(circle(0,-15,.15)),
  blue(circle(1,-14,.15,1.5)),
  blue(circle(1,-14,.1,1.5)),
  blue(arc(0,-15+(1/2),2,1,90,270)),
  blue(arc((1/2),-14,1,2, 180,360))
)}}} So this is the graph of {{{y=x-15}}} through the points *[Tex \LARGE \left(0,-15\right)] and *[Tex \LARGE \left(1,-14\right)]