graphing proportional relationships
equations of proportional relationships
identifying proportional relationships
Solve
Review
100
what coordinate point is the origin?
0,0
100
Is this equation proportional? y= 3x
If so what is the constant of proportionality? (K)
Yes
k=3
100
Are these ratios proportional?
5/(15)and6/(18)
Yes
100
How do you calculate the Constant of Proportionality?
y/x
100
Christian drives 96 miles in 1.5 hours. What is his speed in miles per hour?
What is 64 miles per hour
200
When you do
y/(x)
, what are you finding?
the unit rate, K, or Constant of Proportionality
200
Is y= 4x + 10 proportional? If so what is the constant of proportionality?
Not proportional
200
Is the graph a proportional relationship? Why?
NO
Does not go through the origin
200
Solve
n=3.8
200
Isabella is buying candy bars for 3 of her friends, costing her a total of $3.15. What is the constant of proportionality (aka: unit rate) in this situation?
$1.05
300
what are the 2 ways to tell if a graph is proportional
if the line is straight
goes through the origin
300
Is y= ¾x proportional? If so what is the constant of proportionality?
proportional
k= 3/4
300
Is the table proportional?
No
300
Given the table is proportional, find the constant of proportionality.
K = 13
300
Morgan pays $1.25 for a soda for each of her friends. If she is buying soda for 4 friends, how much will she spend?
What is $5
400
Is this graph proportional?
YES
400
Using this graph, What is the equation? 
y= 1/6x
400
Is the table proportional?
Yes it is proportional
400
John reads 6 pages in 12 minutes. How long does it take him to read a whole page?
2 minutes
400
A plant grows 10 inches in 4 months. How many inches will it grow in one month?
2.5 inches per month
500
If a graph goes through the origin, and passes through (3, 15), what is the constant of proportionality?
k = 5
500
Write an equation for the table given the table is proportional.
y=3/(2)x
500
a) yes
500
8.75 hours
500
Which is a better deal?
5 shirts for $97.45 or 3 shirts for $65.85
5 shirts for $97.45