Trend Tracker Worksheet Trend Tracker
Variables & Equations
Name:
Date:
The Mission
For each scenario: Identify the Independent Variable (x) , the Dependent Variable (y) , and write an equation to represent the trend.
1
Starbucks charges $0.75 for every extra pump of caramel syrup added to a drink.
Independent Variable (x)
Dependent Variable (y)
Equation
2
A hockey player earns exactly 2 points for every goal they score.
Independent Variable (x)
Dependent Variable (y)
Equation
3
Each photo you take on your phone uses up 5 megabytes (MB) of storage space.
Independent Variable (x)
Dependent Variable (y)
Equation
4
A local movie theater charges $12.50 for each ticket purchased.
Independent Variable (x)
Dependent Variable (y)
Equation
5
The wait time in the drive-thru is about 4 minutes for every car in the line.
Independent Variable (x)
Dependent Variable (y)
Equation
6
A hockey player skates at a speed of 150 meters every minute.
Independent Variable (x)
Dependent Variable (y)
Equation
7
Streaming a movie on an app drains 12% of the phone's battery every hour.
Independent Variable (x)
Dependent Variable (y)
Equation
8
A large popcorn bucket contains 16 cups of popcorn. You eat 2 cups every minute.
Independent Variable (x)
Dependent Variable (y)
Equation
9
A goalie makes 6 saves for every 10 shots taken on goal.
Independent Variable (x)
Dependent Variable (y)
Equation
10
A cold drink starts at 35°F and its temperature rises 3°F every hour it sits out.
Independent Variable (x)
Dependent Variable (y)
Equation
Trend Tracker Answer Key Trend Tracker
Answer Key
Teacher Resource
1
Starbucks Syrup ($0.75 per pump)
Independent (x)
# of pumps
Dependent (y)
Total cost (add-on)
Equation
\(y = 0.75x\)
2
Hockey Points (2 per goal)
Independent (x)
# of goals
Dependent (y)
Total points
Equation
\(y = 2x\)
3
App Storage (5MB per photo)
Independent (x)
# of photos
Dependent (y)
MB used
Equation
\(y = 5x\)
4
Movie Tickets ($12.50 per ticket)
Independent (x)
# of tickets
Dependent (y)
Total price
Equation
\(y = 12.50x\)
5
Wait Time (4 mins per car)
Independent (x)
# of cars
Dependent (y)
Wait time
Equation
\(y = 4x\)
6
Hockey Speed (150m per min)
Independent (x)
# of minutes
Dependent (y)
Distance skated
Equation
\(y = 150x\)
7
Battery Loss (12% per hour)
Independent (x)
# of hours
Dependent (y)
Battery lost
Equation
\(y = 12x\)
8
Popcorn (16 cups, 2 cups/min)
Independent (x)
# of minutes
Dependent (y)
Popcorn left
Equation
\(y = 16 - 2x\)
9
Goalie Saves (6 per 10 shots)
Independent (x)
# of shots
Dependent (y)
# of saves
Equation
\(y = 0.6x\)
10
Drink Temp (Start 35, +3 per hour)
Independent (x)
# of hours
Dependent (y)
Temperature
Equation
\(y = 3x + 35\)
Trend Tracker Slides Trend Tracker
Variables & Equations
Analyze the cause, determine the effect, and reveal the math!
Challenge 01
Sweet & Sticky
Starbucks charges $0.75 for every extra pump of caramel syrup added to a drink.
Identify x, y, and the equation...
Solution 01
Sweet & Sticky
Independent (x)
Number of pumps
Dependent (y)
Total cost (add-on)
Equation
\(y = 0.75x\)
Challenge 02
Score Board
A hockey player earns exactly 2 points for every goal they score during the game.
Identify x, y, and the equation...
Solution 02
Score Board
Independent (x)
Number of goals
Dependent (y)
Total points earned
Equation
\(y = 2x\)
Challenge 03
Camera Roll
Each photo you take on your phone uses up 5 megabytes (MB) of storage space.
Identify x, y, and the equation...
Solution 03
Camera Roll
Independent (x)
Number of photos
Dependent (y)
Megabytes (MB) used
Equation
\(y = 5x\)
Challenge 04
Night at the Movies
A local movie theater charges $12.50 for each ticket purchased.
Identify x, y, and the equation...
Solution 04
Night at the Movies
Independent (x)
Number of tickets
Dependent (y)
Total price paid
Equation
\(y = 12.50x\)
Challenge 05
Drive-Thru Delay
The wait time in the Starbucks line is about 4 minutes for every car in the line.
Identify x, y, and the equation...
Solution 05
Drive-Thru Delay
Independent (x)
Number of cars
Dependent (y)
Wait time (minutes)
Equation
\(y = 4x\)
Challenge 06
Ice Coverage
A hockey player skates at a speed of 150 meters every minute during a drill.
Identify x, y, and the equation...
