Ratios
Rates
Direct Proportion Graphs
Ratio/Proportion Tables
Proportion equations
100
4:10 is equivalent to ____:20
What is 8?
100
Find the unit rate:
240 miles in 4 hours
include units!
What is 60 mph? (60 mi/1hr)
100
State whether or not this graph represents a direct proportion.
Yes!
100
State whether either of these tables are directly proportional.
Yes, the daily post represents a direct proportion. The evening star does NOT!
100
Solve for w:
w/6=6/9
What is w=4?
200
3:3/4 = 6:____
What is 1.5 or 3/2?
200
Find the unit rate:
$4.80 for 6 cans
include units!
What is $0.40 per can?
200
The constant of proportionality here
What is 16?
200
The number of crates is directly proportional to the number of peaches to package. Fill in the missing values of the table.
C = 25
P = 2,240
200
Solve for x:
12/10=a/15
What is a=18?
300
The missing value of the ratio here is:
0.4:0.75 is equivalent to 1.6: _____
What is 3?
300
Find the unit rate:
140 pages in 80 minutes
include units!
What is 1.75 pages per min?
300
What is 275 miles?
300
State whether this table represents a direct proportion. If so, write an equation. If not, state why not.
Yes,
y=7x or y/x = 7 or x/y=1/7
300
solve for x: x/8=7/10
what is x=5.6?
400
Find the missing value of the equivalent ratios:
1/24:1/2 = 1/8 :___
What is 3/2 or 1.5?
400
Are these rates equivalent:
5 miles in 2 hours
0.75 miles in 30 minutes
Give evidence!
no,
5 miles in 2 hrs is 2.5 mph
0.75 miles in 30 minutes is 1.5 mph
400
How long it would take the subway to travel 7 miles.
What is 14 minutes?
400
State whether this represents a direct proportion, and if so write an equation that matches this table. If not, state why not.
Yes,
y=1.52x or y/x=1.52 or x/y=1/1.52
400
Solve for x:
2/1.5 = 6/x
What is x=4.5?
500
Find the missing value of the ratio here:
8:1/3 is equivalent to ____:1/4
What is 6?
500
Usain Bolt’s world record in the 100 m dash is 9.58 seconds.
As an 8th grader, Langston Thompson of SPA holds the record for finishing in 12.33 seconds. So fast!
At that speed, how much further can Usain run than Langston in 25 seconds?
What is about 58 meters?
500
Write a direct proportion equation that would match this graph.
What is
y=50t or y/t=50 or t/y=1/50
500
DAILY DOUBLE:
b is directly proportional to a, and a = 14 when b = 42. Find b when a is 7.
B = 21
500
Solve for x:
35/28=x/12
What is x=15?