Linear Equations in One Variable · Exercise 63

Find the slope of the lines that pass through each pair of points and determine whether the lines are parallel or perpendicular.

$\begin{array}{c}\left(2,5\right)\text{and}\left(5,9\right)\\ \left(-1,-1\right)\text{and}\left(2,3\right)\end{array}$

Its source prints no answer for this problem, so there's nothing to check against.

OpenStax, Algebra and Trigonometry 2e · §2.2 Linear Equations in One Variable · Exercise 63