Solve systems of two linear equations exactly and approximately using algebraic and graphical methods.
Estimate the solution of a system from a graph
Problem
Use the graph below to identify the system solution. If the crossing lies on a labeled grid point, identify the exact point; otherwise identify coordinate brackets.
A graphical system solution is the single point shared by both lines. We’ll locate the crossing, read the horizontal and vertical axis scales independently, and record the horizontal coordinate first. Whether the crossing lands on labeled grid lines or between them determines whether the graph supports an exact ordered pair or only coordinate brackets.
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