Consider the linear system of equations. y=-x+9
y=0.5x-6
What is the best viewing window to find the solution to the system of equations?

Step-by-step explanation:

for x = 0 it is:  

y = -0+9 = 9  {y at scope in the first, second and fourth but not the third}

and   y = 0.5•0 - 6 = -6 {y at scope in all but the first}

for x = 20:  

y = -20+9 = -11  {y almost at scope in the second but not in the first}

and y = 0.5•20 - 6 = 4 {y at scope in both, the first and the second}

for x = -20:

y=-(-20)+9 = 29  {y out of scope in both, the third and the fourth}

and y = 0.5•(-20)-6 = -16 {y out of scope in both}

x divided by 8=y

step-by-step explanation:

step-by-step explanation: