Directions: To check your answers, click the mouse to shine the light on the ghost and watch the answers appear! The 7 th Grade Haunted House of Connected Math
What is happening to the x variable and the y variable on the graph? As the x is increasing, the y is increasing at a steady rate and then starting to level off
Which variable is independent and which variable is dependent? number of players Independent Cost dependent
Why did you choose the variable as your dependent variable? the cost depends on the number of shirts
Besides showing patterns easily, would it make sense to connect the points on the graph of cost and number of shirts? No, the data is not continuous. (cannot buy part of a shirt)
Make a table to show Sue making $6.00 an hour from 1 to 6 hours. Time(hr) Money($) 1 $ $ $ $ $ $36.00
Write an equation for the total cost of books if each book is $8.99. c = 8.99n, where c = the total cost & n = the # of books
Write an equation for the total cost if Jen and Mary charge $10 plus $5 an hour to babysit. c = h, where c = total cost & h = # of hours
Lou charges $4.50 an hour to rake leaves. If he graphed the amount earned from 1 hour to 8 hours, what would his graph look like? How do you know? A straight line upward segment It is a constant rate
If p = total number of pencils needed and each student in math class needs 4 pencils, write an equation to show the total number of pencils needed. p = 4n, where p = total # pencils & n = # of students
Explain what it means when a graph is showing a straight-line segment either on an increasing or decreasing slant. means the data is increasing or decreasing at a steady rate
Use the equation d = 55t What is the distance traveled in 5 hours? The distance traveled in 5 hours is 275 miles.
Use the equation d = 8t Find the distance traveled in 2.5 hours? The distance traveled in 2.5 hours is 20 miles.
Use the formula d = 30t If the distance traveled was 120 miles, how long did it take? It would take 4 hours to travel 120 miles.
If you connect the points on a graph and the segment is horizontal from one point to the next, what does this tell you? The data stayed at the same amount
What is the purpose of making a coordinate graph? to show the relationship between variables
Jack is saving $40 a week for a new TV. Make a table to show his savings from 0-4 weeks. Week Savings($) 0 $0 1 $40 2 $80 3 $120 4 $160
Chris is saving for the TV too. He has already saved $120 from his chores. He plans on saving $20 a week. Make a table to show his savings from 0 to 4 weeks. Week Savings($) 0 $120 1 $140 2 $160 3 $180 4 $200
Write an equation for Jack’s total savings for $40 a week s = 40w, where s = the total savings & w = # of weeks
Write an equation for Chris’ savings – he started with $120 and saved $20 a week s = w, where s = total savings & w = # of weeks
Solve 6x = 24 Show work on both sides 6x = 24 ÷6 ÷6 x = 4
Solve x/3 – 15 = 10 x/3 – 15 = x/3 = 25 *3 *3 X = 75
Make sure to review Investigation 1 and 2 quizzes Study tonight…. Good Luck tomorrow!!
Thank you for playing!