If y is equal to m x plus b is the equation of a line perpendicular to the line y is equal to 5 x minus 2 , what is the value of m ?

The line y = 5x − 2 has slope 5, the coefficient of x. Perpendicular lines have slopes that are negative reciprocals, so m = −1/5. Therefore, the correct choice is B, m is equal to negative 1 fifth.

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