WARM-UP — 5 MINUTES

How Much Does a DART Ride Cost?

Dallas Area Rapid Transit

Dallas Area Rapid Transit
$5.00
Day Pass
Unlimited Rides All Day
🤔 Think About It! If you ride 3 times with a $5 Day Pass, how much per ride?

Quick-write or partner chat — 2 minutes!

I DO — EXPLICIT INSTRUCTION

🌮 Tacos at the Local Taquería

🌮 DALLAS TACOS 🌮
TACOS — $2 each
Fresh & Delicious!

Let's Build a Table!

Tacos (x)Cost $ (y)
1$2
2$4
3$6
4$8

🖩 Desmos Steps — Find the Equation!

1 Pick TWO points from the table
2 Press the + (plus) button in Desmos
3 Click "table"
4 Type your two points into the table
5 Click "Add regression" → Desmos gives: y = 2x
⚠️ m = MULTIPLIER (the number TOUCHING the x) → slope = 2
⚠️ b = BONUS (the number all by itself) → y-intercept = 0
WE DO — GUIDED PRACTICE

Problem 1: Katy Trail Walk

🚶 "Jaylen walks on the Katy Trail. He walks 2.5 miles per hour."
🌳 — — — KATY TRAIL — — — 🌳

Data: (1, 2.5) and (2, 5)

Step 1: Pick two points: (1, 2.5) and (2, 5) ✅
Step 2: Press + → click "table" → type points ✅
Step 3: Click "Add regression" → Desmos gives: y = ____x
Step 4: slope (m) = ____ → Jaylen walks ____ miles per hour

📋 Desmos Checklist

☐ Pick TWO points
☐ Press + → table
☐ Type points in table
☐ Click "Add regression"
☐ Read the equation
☐ m = MULTIPLIER (slope)
☐ b = BONUS (y-intercept)
WE DO — GUIDED PRACTICE

Problem 2: Dallas Mavericks Tickets 🏀

🏀 "The Mavericks sell tickets. Use the table to find the cost per ticket."
Tickets (x)Cost $ (y)
2$50
4$100
Step 1: Pick two points: (2, 50) and (4, 100) ✅
Step 2: Press ____ → click ________ → type points
Step 3: Click ________________ → Desmos gives: y = ____x
Step 4: slope (m) = ____ → Each ticket costs $____

📋 Desmos Checklist

☐ Pick TWO points
☐ Press + → table
☐ Type points in table
☐ Click "Add regression"
☐ Read the equation
☐ m = MULTIPLIER (slope)
☐ b = BONUS (y-intercept)
Remember: m is the number TOUCHING the x!
YOU DO — INDEPENDENT

Problem 3: Elotes at Dallas Farmers Market 🌽

🌽 "Elotes (corn cups) at the Dallas Farmers Market cost a set price per cup."
Cups (x)Cost $ (y)
1$4
3$12

Your turn! Do ALL steps with Desmos on your own.

Step 1: Points: (__, __) and (__, __)
Step 2: Press ___ → click ___ → type points
Step 3: Click _______________ → Desmos gives: y = ____x
Step 4: slope = ____ → Each elote costs $____

📋 Desmos Checklist

☐ Pick TWO points
☐ Press + → table
☐ Type points in table
☐ Click "Add regression"
☐ Read the equation
☐ m = MULTIPLIER (slope)
☐ b = BONUS (y-intercept)
💪 You've got this! Follow the checklist step by step.

🎫 Exit Ticket — Day 1

1. The table shows the total cost for buying tamales at a Dallas market.

TamalesCost
2$5.00
4$10.00
6$15.00

What is the slope (unit rate) of this relationship?

A. $5.00 per tamale
B. $2.50 per tamale
C. $15.00 per tamale
D. $10.00 per tamale

2. A line passes through (0, 0) and (4, 12). What is the slope?

A. 4
B. 3
C. 12
D. 1/3

Use Desmos! Pick 2 points → + → table → Add regression → Read m

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