In the figure attached, a sign chart is shown. To fill it out you need to find the function's zeros and asymptotes. The zeros are those x values that makes the function equal to zero, in the example, those are the x values that make the denominator equal to zero (x = -1 and x = 5). In a rational function, the asymptotes are those x values that make the numerator equal to zero (x = -9 in the example)
X-y=7 so you have to rewrite the equation in the form of mx+b=y so ... x-y=7 -x -x -y=7-x then simplify -y(-y)=-(7-x) multiply both sides by -1 y=-7+x which is the same y= x-7 y=x+-7