OpenStax, Intermediate Algebra 2e §3.2 Slope of a Line · Example 11 · Algebra · Graphs

Slope of a Line · Example 11

Use slopes to determine if the lines are perpendicular:
ⓐ $y = - 5 x - 4$ and $x - 5 y = 5$ ⓑ $7 x + 2 y = 3$ and $2 x + 7 y = 5$

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OpenStax, Intermediate Algebra 2e · §3.2 Slope of a Line · Example 11

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