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In the four-step method for solving a system of linear equations by graphing, what is done immediately after graphing both equations?
AIdentify the point of intersection as the final answer
BCheck the solution in both of the original equations
CRewrite both equations in slope-intercept form first
DDetermine whether the lines intersect, are parallel, or match
Answer & Solution
Correct answer: D. Determine whether the lines intersect, are parallel, or match
1. The method graphs the first equation, then the second equation on the same coordinate system.
2. The very next step is to determine whether the two graphed lines intersect, are parallel, or are the same line.
3. Only after that determination does the method move on to identifying the solution and checking it, and rewriting in slope-intercept form is not a listed step at all.
_Source: OpenStax Elementary Algebra (CC BY 4.0), Ch 5 "Systems of Linear Equations", section 5.1 Solve Systems of Equations by Graphing_
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