Two-variable equations
10 videos
0
4
Pre-algebra - Two-Variable Equations: The Big Picture
Learn how two-variable equations work using a pizza budget example. Discover how equations like x+y=12 have infinite solutions that form a line on a graph.
0
0
Pre-algebra - Is This Ordered Pair a Solution?
Learn how to verify if an ordered pair is a solution to a linear equation by substituting x and y values and checking if both sides are equal.
0
0
Pre-algebra - Finding the Missing Value in a Solution
Learn how to find a missing coordinate by plugging in a known value into a linear equation and solving step by step to find the complete solution point.
0
0
Pre-algebra - X-Intercepts and Y-Intercepts Explained
Learn what x-intercepts and y-intercepts are, where lines cross axes, and the key rule: at x-intercepts y=0, at y-intercepts x=0.
0
0
Pre-algebra - Finding Intercepts from an Equation
Learn how to find x and y intercepts by setting the other variable to zero and solving. Includes a step-by-step example with graphing.
0
0
Pre-algebra - Reading Slope from a Graph
Learn how to calculate slope using rise over run. Pick two points on a line, count vertical and horizontal distances, then divide to find the slope.
0
0
Pre-algebra - Slope from Two Points Using the Formula
Learn how to calculate slope using two points and the formula m = (y2-y1)/(x2-x1). Includes a step-by-step example showing how rise over run equals slope.
0
6
Pre-algebra - Slope-Intercept Form: y = mx + b
Learn slope-intercept form (y=mx+b) to write and graph linear equations. Understand how slope (m) and y-intercept (b) define any line quickly and easily.
0
0
Pre-algebra - Graphing a Line from y = mx + b
Learn how to graph linear equations using slope-intercept form (y=mx+b) by plotting the y-intercept and using rise over run to find a second point.
0
0
Pre-algebra - Writing y = mx + b from Two Points
Learn how to write a linear equation in slope-intercept form (y=mx+b) using two points by finding the slope and y-intercept.