Recap: Two Relations

Part of the Graphs & Systems section of Coddy's Algebra journey. Lesson 33 of 61.

Challenge

Medium

A line is perpendicular to $2x+5y = 10$ . The slope of that line is $\frac{-A}{B} = \frac{-2}{5}$ . Perpendicular slopes multiply to -1, so the new slope $m$ satisfies $\frac{-2}{5}m = -1$ . Find $m$ .

Try it yourself

\frac{-2}{5}m = -1

Get $m$ alone

All lessons in Graphs & Systems

1Points and Rules

Two Numbers, One Point A Rule Makes Points The Points Line Up

4Slope-Intercept Form

y = mx + b The Starting Height Write the Equation Solve for y Draw From Any Form Recap: y = mx + b

7Parallel & Perpendicular

Same Slope, Never Meet The Perpendicular Slope A Right-Angle LineRecap: Two Relations

10Systems by Graphing

Two Lines, One Answer Solve by Drawing Check the Crossing When Lines Never Cross Recap: By Graphing

2The Whole Plane

The Four Quadrants Mirror Points On the Line or Not?Recap: Rule to Line

5Point-Slope Form

A Point and a Slope From Two Points Flat or Vertical Through Draw From a Point Recap: Point-Slope

8Function Notation

The Name of a Rule Inputs With Signs Find the Input The Graph of f Recap: f(x)

11Solving Systems Exactly

Substitution Isolate First Elimination Scale, Then Add Three Unknowns Two Numbers, Two Facts Recap: Two Methods