Ratios
What is the definition of a ratio?
Ratios compare two values
What is the definition of a unit rate?
Unit rates compare two values at a rate of 1.
What is the definition of proportion?
A proportion is when two ratios are equivalent and have the same unit rate.
What is the definition of constant of proportionality?
What are three ways we can express ratios?
A/B
A : B
A to B
What does "per" mean?
If I told you something was proportional, what does that mean?
The are equal/have the same unit rate
What letter is used as the variable to represent "constant"?
K
What is an equivalent ratio to 3/5?
6/10
If Matt drives to 12 states in 4 days, how many states does he drive to per day?
3 states per day
The ratios 1/2 and 10/20 are proportional
True
What is the formula for constant of proportionality?
K = y/x
True or False:
The ratios 5:4 and 15/8 equivalent
False
If I graded 12 papers in 1.5 hours, how many papers could I grade per hour?
8 papers per hour
Ava ate 3 donuts in two hours, how many donuts would she eat in ten hours?
15 donuts
It took Mike 4 hours (x) to cut 14 acres of grass (y). What is the constant of proportionality?
3.5
What is one equivalent ratio to 2.2 : 4?
1.1 : 2
4.4 : 8
Sal pays $1.50 for 0.75 pounds of peppers at Kroger. How much does he pay per pound?
$2 per pound
Give one proportional ratio to the following:
3:8
4.5:12
6:16
7.5:20
If the constant of the data was 6. What two equations can we use to figure out what "x" and "y" equal?
x = y/6
y = x*6