Use the slope formula to find the slope of the line that passes through the points ​(−1​,−2​) and ​(−1​,−4​). State whether the line is​ increasing, decreasing,​ horizontal, or vertical.
in Algebra 1 Answers by

Your answer

Your name to display (optional):
Privacy: Your email address will only be used for sending these notifications.
Anti-spam verification:
To avoid this verification in future, please log in or register.

1 Answer

The general linear equation is usually written y=mx+b, where m is the slope=(difference between coord)/(difference between x coord); BUT if the difference between the x coord is 0 then the line is vertical (the slope is infinite meaning 90 degrees), because, no matter what the value of y is, x=-1, so that's the equation of the vertical line: x=-1. The more general linear equation is ax+cy+d=0 so in this case a=1, c=0 and d=1.

by Top Rated User (775k points)

Related questions

Welcome to, where students, teachers and math enthusiasts can ask and answer any math question. Get help and answers to any math problem including algebra, trigonometry, geometry, calculus, trigonometry, fractions, solving expression, simplifying expressions and more. Get answers to math questions. Help is always 100% free!
85,260 questions
90,519 answers
81,841 users