Rewrite the equation into the general form: y=mx+b, where m represents slope. We have: x-y=8 -y=-x+8 y=x-8 Here, m happens to be 1. The slope of a perpendicular line to an equation is the negative reciprocal of the number. For example, the negative reciprocal of 2 is -1/2 (so you 'flip' the number). So the negative reciprocal of 1, or 1/1, is -1. So the slope of the line perpendicular to that equation is -1.
I don’t really understand what this is asking but the formula for circumference is C= πd Remember that diameter (width of the circle) is double the radius (half the width of the circle) and π is about 3.14 Hope this helped
