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Variables
Constant of Proportionality
Rate of Change
Equations
Mystery
100
What is a variable?
a quantity that may change within the context of mathematical problem; typically use a single letter to represent a variable.
100
What is constant of proportionality and the formula?
Constant of proportionality is the rate in which the x and y variables change in relationship to one another. It goes through the origin. K= y/x
100
What is rate of change?
Rate of change is the rate in which two variables change and does not go through the origin.
100
What is a coefficient?
A number in front of a variable
100
What are the rules for adding integers?
DIFFERENT SIGNS- Subtract and Keep the Sign of the Bigger Number! SAME SIGN: add and keep the sign
200
What is an independent variable?
A variable located on the x axis, it is generally the value we choose.
200
What is the constant of proportionality of the scenario below? James wants to buy books. The cost for every book is $4.
4
200
What is the formula for rate of change?
change of y / change of x
200
What is an equation?
A mathematical expression that has an equal sign
200
What is the cost per apple if for every 10 apples, he pays $12?
1.2
300
What is a dependent variable and what variable is used to represent it?
a variable whose value changes in response to another . Represented by "y"
300
What is the constant of proportionality when an x value is 8.50 and a y value is 17?
y/x=k 17/8.5 =2
300
What is the rate of change if it cost 9 dollars enter into a theme park and $2 per ride?
2
300
The scale of a model truck is 1inch to 14.25 feet. One of the model cars are 7 inches. What is the length in feet of the actual car?
99.75
300
What is 17.5 divided by 2?
8.75
400
What is the independent and dependent variable in the scenario below? Jahnesa's bank account relationship can be described as the the amount of money in the account depends on the weeks
D.V: account balance I.V: weeks
400
What is the constant of proportionality of the table below? # of songs 5 12 20 total cost 4.5 10.8 18
0.9
400
A pool holds 28 mL of water with 4 mL of water every 2.5 mins. What is the rate of change for filling the pool ?
1.6
400
Thazard paid $3.52 for 6 grapes. If p represents the cost, in dollars, and n represents the number of grapes purchased. What is the best equation to describe this relationship?
p= .42n
400
What is 27.383 x 16.5= ?
451.8195
500
What two quantities are being compared and describe the relationship. Hours 2 4 6 8 10 12 Dollars 18 36 54 72 90 108
Hours and dollars are being compared. The relationship would be described as the dollars would depend on how many hours have passed.
500
If there is an initial deposit to rent a car of $15 and it cost $30 per day. What is the constant of proportionality
There is no constant of proportionality
500
Which rate of change is greater? Jacob has 8 chocolates. He receives 4 more chocolates per day. Allow Y to be chocolate and X is number of days.   Tyrone has 10 drinks at the start of P.E on Monday. He purchases 2 more drinks everyday.
Jacob
500
What is the best equation to represent the table? x y 3 7 6 13 9 19 3x +1, -2x+1, 2x + 1, 3 - 3.5x
2x + 1