does the grapg show the system of equations x+y=2 and -x+y=7? should the lines for the system be parallel?
a. the graph of x+y=2 is incorrect. the lines should intersect.
b. the graph -x+y=7 is incorrect. the lines should intersect.
c. the graph of -x+y=7 is incorrect. the lines should be parallel.
d. both graphs are correct. the lines should be parallel.
1 answer
c. the graph of -x+y=7 is incorrect. the lines should be parallel.