What is the main reason why you would choose to solve a system of equations using the graphing method?

Question

a. Both equations are in standard form

b. The "y" variable is isolated in both equations

c. One variable is isolating at least one of the equations

Answer 1

I would choose (b).  When y is isolated, the equation is in slope-intercept form, the easiest possible form for graphing.  In standard form (a), the system is most easily solved using matrices.  Choice (c) demonstrates what happens when a creative mind, armed with jargon, is tasked with creating a meaningless entry in a multiple-choice problem.