Ratios
There are 16 parakeets in a cage of 36 birds. What is the ratio of parakeets to birds in simplest form?
4:9
What does the word "uni" mean?
1
Write the meaning of this ratio: 3 dogs to 5 cats
For every 3 dogs there are 5 cats.
A. 224 gorillas in 4 zoos
B. 112 gorillas in 8 zoos
C. 202 gorillas in 1 zoo
D. 168 gorillas in 6 zoos
Which one doesn't belong and why doesn't it?
C. 202 gorillas in 1 zoo
It is a unit rate and the others are rates
Are these equivalent?
$3 for 6 bagels: $9 for 24 bagels?
NO
There are 14 parrots in a cage of 30 birds. What is the ratio of birds that are not parrots to total birds in simplest form?
8:15
Is this a rate or unit rate?
45 miles in 5 hours
Rate
At a preschool there is 1 teacher for every 12 students. How many teachers are at the preschool out of 276 students?
23
A. Beth walks 9 blocks in 45 minutes.
B. Beth walks 4 blocks in 25 minutes.
C. Beth walks 8 blocks in 40 minutes.
D. Beth walks 12 blocks in 60 minutes.
Which one doesn't belong and why doesn't it? belong?
B. Beth walks 4 blocks in 25 minutes.
This one has a unit rate of just Beth walking 1 block in just over 6 minutes. All of the other ones Beth walks 1 block in 5 minutes.
270 calories in 3 servings; 450 calories in 5 servings?
YES
There are 55 steel bridges and 15 wooden bridges in Holland. What is the ratio of wooden bridges to steel bridges in Holland in simplest form?
3:11
Correctly write this as a rate then unit rate:
Sheila typed 456 words in 12 minutes. How many words did she type in one minute?
words 456 38 words
minutes 12 1 minute
It needs to be written in money form in order to get credit for this question.
$2.90
A. 4.5 feet per second
B. 112.5 feet in 25 seconds
C. 86.4 feet in 18 seconds
D. 54 feet in 12 seconds
Which one doesn't belong and why doesn't it?
C. 86.4 feet in 18 seconds
12 minutes to drive 30 laps; 48 minutes to drive 120 laps?
YES
Student's Favorite color Number of Responses
BLUE 8
GREEN 12
YELLOW 14
RED 20
The table above shows the survey when students were asked what their favorite color is. What is the ratio of green to non-green colors in simplest form?
2:7
Write this correctly as a unit rate:
Sam can wrap 135 boxes in 4 hours. How many boxes can he wrap per hour?
33.75 boxes per hour
Predict the number of roses in a garden with 16 sunflowers if there are 3 sunflowers in a garden of 81 roses.
432 roses
A. Ratios
B. Ratio Tables
C. Proportions
What do these ALL HAVE IN COMMON?
They all compare 2 or more quantities.
A human adult takes about 16 breaths in 60 seconds. A puppy takes about 8 breaths in 15 seconds. Are these equivalent ratios?
NO
If the ratio of yellow boots to red boots in 4:3, how many red boots do I have if I have 60 yellow boots?
45
A hummingbird's heartbeat is about 7500 beats every 30 minutes. A baby human's heart beats about 2600 times every 20 minutes. How many more beats does a hummingbird's heart beat in 60 minutes than a baby human's heart?
7200 heartbeats in 60 minutes.
The ratio of the number of texts sent by Luke to the number of text messages sent by his sister is 3:5. Luke sent 42 text messages. How many text messages did his sister send?
70
A. x axis
B. y axis
C. origin
D. ordered pair
What do these ALL HAVE IN COMMON?
These are all found on the coordinate plane.
What are the 3 ways that you can determine if ratios are equivalent?
You must name all 3 to get the points for this question.
1. Simplify the ratios if you can.
2. Find the UNIT RATE of each ratio
3. Cross multiply to determine if they are equivalent