Mrs.D Math · 8th Grade

SLOPE
SLEUTH

Slope & Y-Intercept
📐 Slope
🪣 Rise/Run
📊 Tables
🔍 m = rise/run
📈 Read the Graph
📋 Fill the Table
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🔍 Becoming a Slope Sleuth

What Is Slope?

m = rise / run

Slope measures how steep a line is. Rise is how far you move up or down; run is how far you move right.

1
Pick the two dots on the line. Start at the left dot.
No labels? No problem — count the grid squares!
2
Count the rise: squares UP (+) or DOWN (−) to reach the other dot's height.
3
Count the run: squares to the RIGHT. Then write rise over run and reduce.
Up 4, right 2 → m = 4/2 = 2

Graph → Table

Every dot on the line is an ordered pair (x, y). The table lists the same points — find each x on the graph and read the line's height for y.

✓
Find the missing x-value on the x-axis, then move straight up or down to the line.
✓
The height where you hit the line is the y-value — type it in the table.
✓
Check yourself: the y-values should change by the same amount each time x changes by the same amount. That's the slope!

How to Play

📈
Find the Slope — Two dots, no labels. Type the slope as a fraction (whole numbers go over 1).
📋
Graph → Table — Use the graphed line to type the missing y-values in the table.
🆕
Mixed — Both types together for the ultimate detective challenge!
🧮
Calculator — Tap the gold calculator button any time. Try it in your head first, then verify!
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FIND THE SLOPE
📺 Mrs.D Math Lesson
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