OpenStax, Intermediate Algebra 2e §3.2 Slope of a Line · Try It 21 · Algebra · Graphs

Slope of a Line · Try It 21

Use slopes to determine if the lines are perpendicular:
ⓐ $y = - 3 x + 2$ and $x - 3 y = 4$ ⓑ $5 x + 4 y = 1$ and $4 x + 5 y = 3.$

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OpenStax, Intermediate Algebra 2e · §3.2 Slope of a Line · Try It 21

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