Graphing Proportional Relationships
Identifying Proportional Relationships
Identifying Proportional Relationships, part 2
Solve
100
What ordered pair is used for the origin?
(0,0)
100
A proportional relationship shows what type of relationship?
Multiplicative Relationship
100
Are these ratios proportional? 
Yes
100
Viona rides their bike for 2 1/2 hours and travels 42 miles. What is their unit rate in miles per hour?
= 16.8 miles per hour
200
How do you tell if a graph represents a proportional relationship.
Straight line through the origin or if y/x is constant.
200
Are these two ratios proportional?
1:4 and 2:8
yes, proportional
200
Is the graph a proportional relationship? Why?
NO
Does not go through the origin
200
Solve
n=3.8
300
Are all line graphs proportional relationships?
no
300
True or False:
These two ratios are not proportional.
10:20 and 6:12
FALSE. Thy are proportional because they are equivalent to 1:2
300
Is the table proportional?
No
300
Given the table is proportional. Solve for m
m = 13
400
Is this graph proportional?
YES
400
Are these ratios proportional?
12:16 and 15:20
Yes, because they are both 3:4
400
Is the table proportional?
Yes it is proportional
400
Kendra and Kevin are baking cookies using the same recipe. Kendra makes 6 dozen and Kevin makes 3 dozens. If Kevin is using 6 ounces of chocolate chips, how many ounces will Kendra need?
12 ounces.
Because they need 2 ounces per dozen (unit rate) so 6 (Kendra's dozen) x 2 ounces=12 ounces
500
Paul drives to his friends house 250 miles in 5 hours. If this is drawn on a graph where y is miles and x is hours. What is the ordered pair coordinates for if this data was graphed on a coordinate plane?
(5,250)
500
Does this table show a proportional relationship? why?
Yes, because the number of tickets is being multiplied by 1.5 each time to get the cost.
500
a) yes
500
Sam took 8 hours to drive 272 miles. What was the unit rate in miles per hour?
34 mph