Math Definitions
Proportional Relationships
Circles
Equations
Equivalent Ratios in Scale Drawings
100
1/15 and 15 are what of each other
Reciprocal
100
Is the graph represented in this table Proportional or not?
Proportional
100
Find the circumference of the circle.
18.84 cm
100
What is the equation for proportional Relationships
y = kx
100
David measured a swimming pool and made a scale drawing. A 20-foot diving board is represented with 2 inch line in the drawing. What scale did David use for the drawing?
1 inch = __ ft
10 ft
200
What is the name of the line that goes from one end of the circle to the other and crosses the center point?
Diameter
200
Is the graph proportional or non proportional?
No
200
Is the circumference of a circle a proportional relationship
Yes
200
Does this equation represent a proportional relationship? If not why?
y = 3400x -123
No the equation will not go through the origin
200
Luther made a scale drawing of an Italian restaurant. He used the scale
1 millimeter in the drawing : 6 meters in real life
What is the width of the actual kitchen if the kitchen in the drawing is 3mm?
18 m
300
What is the distance around a circle
Circumference
300
Craig earns extra money as a lifeguard. He earns $37 for 4 hours and $64.75 for 7 hours. What is the constant of proportionality?
$9.25
300
What is the area of a circle with radius 100, rounded to the nearest tenth?
314.2
300
The equation
y= pid
is the equation for what
Circumference
300
Duncan drew a scale drawing of a house. The scale of the drawing was
1 millimeter : 5 meters
The actual length of the garage is 10 meters. How long is the garage in the drawing?
2 mm
400
y=kx, what does the k represent in this equation
The Constant of Proportionality
400
Why does this graph show a non-proportional relationship?
It does not go through the origin
400
The homeowners association wants to enclose their circular playground in a fence. How much fencing is needed?
Is this question finding the area or the circumference?
Circumference
400
What is the equation for the area of a circle
y = pi r^2
400
Gabby made a scale drawing of the town library. She used the scale
1 centimeter : 5 meters
The actual width of the parking lot is 80 meters. How wide is the parking lot in the drawing?
16 cm
500
The distance from the edge of a circle to the midpoint is known as the what?
The Radius
500
Which graph is proportional?
All of them
500
Randy’s circular garden has a radius of 1.5 feet. He wants to enclose the garden with edging that costs $0.75 per foot. About how much will the edging cost? Use 3.14 for
pi
$ 7.07
500
Is the equation shown for circumference or area
y = pi(13)^2
Area
500
Shelley drew a scale drawing of her school. She used the scale
5 millimeters : 3 meters
If the actual width of the parking lot is 42 meters, how wide is the parking lot in the drawing?
70 mm