Proportional Relationships
On a graph, what must be present for the graph to be proportional relationship?
Must go through the origin.
Must be a straight line.
Convert 0.3 to a percentage
30%
The radius is _________ of the diameter
The cost of a concert ticket last week was $60. This week a concert ticket is $75. What is the percent increase of the ticket form last week to this week?
25%
A recipe for biscuits calls for 1/4 teaspoon baking powder per 1 and 2/3 cups of flour. What is the unit rate for baking powder and flour?
3/20 teaspoon baking powder per cup of flour
Looking at the coordinate (30,15) on a graph where the x axis represents minutes and y axis represents money earned, what does that coordinate represent?
30 minutes of work is $15 earned
Convert 75% to a decimal
The diameter is ___________ the radius
Double
Missy bought her car for $27,000. Alice bought the exact same car for 7% less than Missy. How much less did Alice pay?
$1,890
Alicia is making cupcakes for a party she is having and wants to make sure everyone gets at least one cupcake. The recipe calls for 1/2 of a teaspoon of salt for every batch and each batch makes 21 cupcakes. If Alicia is having a party with 84 people attending, how many teaspoons of salt will Alicia use?
2 teaspoons of salt
What is the unit rate or k for the coordinate (45,90)?
k = 2
Convert 0.045 to a percentage
4.5%
If the radius of a circle is 14in, what is the circumference?
87.92inches
A $29.99 lamp is on sale for 35% off. What is the cost of the lamp?
$19.49
Raphael went to the store and bought 5/2 pounds of chicken for $9.00. What was the cost per pound of the chicken? Round your answer to the nearest CENT, if necessary.
$3.60
A recipe calls for 3 cups of flour to make 12 cookies. Mrs. Redden needs to make 20 cookies for the class. Mrs. Redden told Mr. Redden that she would need 6 cups of flour to make the cookies. Is that the correct amount of flour that she needs? If not, explain and prove how much she needs.
Mrs. Redden is incorrect. Mrs. Redden needs 5 cups of flour to make 20 cookies.
Convert 125% to a decimal
1.25
Diameter is 36inches. What is the area?
1,017.36in2
A $49.99 chair was marked up 60% by Target? How much did Target sell the chair for?
$79.98
A camel drank 5/2 gallons of water in 1/4 hour. What was the average rate in gallons per hour at which the camel drank?
10 gal/hr
A store sells books for $12 each. In the proportional relationship between x, the number of books purchased, and y, the cost per book in dollars to y, the total cost of the books in dollars, the constant of proportionality is 12. What is the equation that shows the relationship between x and y?
y = 12x
45.375
The area of a circle is 48picm2. What is the diameter?
13.86cm
Kevin works at a paint store and is paid 9% commission on his sales. Today his sales total was $750. Today his sales total was $750. To the nearest dollar, how much did Kevin earn in commission today?
$68.00
What is the unit rate?
2/7
3/10.5
4/14
5/17.5
6/21
3.5