Scale Factor
Is it Proportional
Find The Missing Value
Find the Constant of proportionality
Writing equations
100
What is the scale factor of 1 inch to a foot
1:12
100
40/80
17/d
d=34
100
1/x=2/4
2
100
5/10=r/2
what is r
r=1
100
What letter do we use to represent constant?
k
200
Nancy made a scale drawing of a restaurant. The scale of the drawing was 9 centimeters = 1 meter. What scale factor does the drawing use?
Simplify your answer and write it as a ratio, using a colon.
9:100
200
11/121
1/x
1/11
200
3 6 9 12 _ 18 _
15 21
200
What are the coordinates of the origin?
(0,0)
200
If an ant has 6 legs write and equation that represents the relationship between ants and legs
a=6l
300
Robbie made a scale drawing of a campground. He used the scale 7 inches = 1 yard. What scale factor does the drawing use?
Simplify your answer and write it as a ratio, using a colon.
7:36
300
Dave prepared 10 kilograms of dough after working 2 hours. How much dough did Dave prepare if he worked for 4 hours? Assume the relationship is directly proportional.
20kg
300
6ft= ? inches
72 inches
300
When graphing a proportional relationship what 2 things must the line be/do?
straight line that passes through the origin
300
There are 3 bikes. Write an equation that represents the ammount of bikes and wheels as well as the equation in simplest form.
3b=6w
1b=2w
400
Sam measured a house and its lot and made a scale drawing. In real life, the house's driveway is 16 feet wide. It is 8 inches wide in the drawing. What scale did Sam use for the drawing?
1inch:2ft
400
The corporate team-building event will cost $10 if it has 5 attendees. How many attendees can there be, at most, if the budget for the corporate team-building event is $26? Assume the relationship is directly proportional.
13 attendees
400
2:9
4:x
8:36
18
400
true or false a table that contains the coordinates (1,0) (-1,0) and (2,1) can be proporional?
false
400
Matthew is trying to figure out how many kilometers are in a marathon. He learns that 1.6 kilometers is equivalent to 1 mile, and that there are 26.2 miles in a marathon.
Write an equation to represent the relationship between miles (m) and kilometers (k):
m=1.6k
500
Colette drew a scale drawing of a swimming pool. She used the scale 10 centimeters = 6 meters. What scale factor does the drawing use?
1:60
500
Mark baked 24 cookies with 2 scoops of flour. With 3 scoops of flour, how many cookies can Mark bake? Assume the relationship is directly proportional.
36 cookies
500
What should be in the row with 25 and why?
20
Its a 4:5 ratio and 25 divided by 5 is 5 thus we multiply 4 by 5
4x5=20 5x5=25
500
Create an example of a table with 3 rows that is proportional with the ratio 1:3
1:3
2:6
3:9
500
What do the values of m and b stand for in the y=mx+b formula
slope and y intercept