f(x)=x-5 f(x) could be subsitututed with y so y=x-5 this is in y=mx+b form where m=slope and b=y-intercept y=1x-5 slope=1 average rate of change=1/1 if x=-2 then y=-2-5 y=-7
we know that the interior angles equal 180 and that the triangles are congruent so, 66 + 78 = 144 so then we have to subtract 180 - 144 and that gives us 36