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HSA.REI.D.11 Tutor Intake — Intersections as Solutions

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Grade 9·7 problems·~11 min·Common Core Math - HS Algebra·standard·hsa-rei-d-11

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Procedures

A graph shows that $y = x + 1$ and $y = x^2 - 1$ intersect at
two points: approximately $(-1, 0)$ and $(2, 3)$ .

What are the approximate solutions to $x + 1 = x^2 - 1$ ?

$y = 0$ and $y = 3$

$x = -1$ and $x = 2$

Only $x = 2$ (positive solutions only)

The ordered pairs $(-1, 0)$ and $(2, 3)$