OpenStax, Intermediate Algebra 2e §3.2 Slope of a Line · Try It 22 · Algebra · Graphs

Slope of a Line · Try It 22

Use slopes to determine if the lines are perpendicular:
ⓐ $y = 2 x - 5$ and $x + 2 y = - 6$ ⓑ $2 x - 9 y = 3$ and $9 x - 2 y = 1.$

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OpenStax, Intermediate Algebra 2e · §3.2 Slope of a Line · Try It 22

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