CPM Homework Help : AC Problem 8-121

Multiple Choice: Which line below is perpendicular to the line $2x-5y=3$ ?

Hint 1:

Two lines are perpendicular if their slopes are negative reciprocals.

Put each equation, including the one in the problem, into slope intercept form.

Hint 2:

Solve for $y$ .

$\begin{array}{l} 2x - 5y = 3 \\ \quad \; \, - 5y = 3 \\ \qquad \; \; \, y = \frac{2}{5}x + \frac{3}{5} \end{array}$

Answer:

$m=\frac{2}{5}$

Reminder:

For a perpendicular line, $m=-\frac{5}{2}$ .

Hint (a) - (d):

Solve for $y$ .