Question

Which of the following lines is perpendicular to the line

Answer 1

The slope should be - ⁵/₃ because its perpendicular

by trying the options

A =

3x - 5y = 20
-5y = 20-3x

y = -4 + ³/₅x

so A is incorrect

Option B

3x + 5y = 20

5y = 20-3x

y = 4 - ³/₅ x

So option B is incorrect

Option C

5x + 3y = 21

3y = 21 - 5x

y = 7- ⁵/₃ x

so Option C is the correct answer