Scale Drawing 1
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How do you determine the Scale Factor?
Copy divided by original
Side length of figure G is 15. The corresponding side length on figure H is 18. What is the scale factor?
1.2
18/15 = 1.2
How do we determine if a table has a proportional relationship?
y/x = k
on EVREY Ratio in the table
Based on the table, how many cups of blue paint do you need for every but of red paint ?
Blue Red
4 1
12 3
4 cups
If a rectangle is enlarged by the scale factor of 3 to create a new rectangle. What would happen to the new rectangle
A) all the angles would enlarge by 3
B) all the sides would enlarge by 3
C) all angles and all sides would enlarge by 3
B) All the sides would enlarge by 3
BECAUSE ANGLES DONT CHANGE
A right Trapezoid has the height of 26 and the base of 42. The copy has a base of 26.25. What is the height on the copy?
16.25
Write an equation for the table below
x y
2 16
5 40
7 56
Gas cost
5 18.25
12 42.80
What is the cost per gallon of gas?
$3.65
A parallelogram has the angles 63, 89, 100, and 108. If the scale factor is 3 what will the angel 63 become?
it will stay 63.
Side lengths may increase or decrease due to scale factors but ANGLES do NOT change
Bagels Minutes
18 12
15 10
Write an equation that represents the relationship between b, the number of bagels and m, the number of minutes
m=2/3b
Write an equation to represent Amina's trip to the store. Amina paid 10.02 for x brownies that cost 1.67 each.
10.02 = 1.67x
Create an ordered pair that would be proportional as (0,0) , (4,10) , (8,20)
Anything where y/x = 2.5
A triangle has the side lengths 4, 6, and 9. If the scale factor applied is 1/2 what are the new side lengths?
2, 3, 4.5
The base of flag is .50 and the height is .25. Jershaya wants to create another flag where the height is 15. What would be the area of Jershaya's flag?
450
Which statement does not apply to the table below?
x y
1 2
2 6
3 12
A) it is not a proportional relationship because (0,0) is a solution
B) it is not a proportional relationship because the graph of the equation is not a straight line
C) is it a proportional relationship
B
Caleb drives 180miles on 6 gallons of gas. Later, he drives20 miles on 14 gallons of gas. How many miles would he drive on 9 gallons of gas?
270
Figure A has a length of 4 and a base of 10. Figure B has a length of 5, what is the base?
A B
4 5
10 x
5/4 x 10 = 12.5
The temperature of a classroom is constantly increasing. At 8am the temperature was 68 degrees. 5 hours later is was 83 degrees. How many degrees does the temperature increase per hour?
3 degrees
Michael takes 15 pages of notes during 6 hours of this ELA class. He takes 40 pages of notes during 16 hours of class. How many pages of notes might he take in 3 hours of class?
7.5 pages of notes
Brownies Cost
4 14
12 42
According to the table, write an equation that would represent the relationship between b, brownies, and c, cost
d=3.5c