Directly Proportional Functions, in Depth
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- Direct Proportion Two variables xxx and yyy are directly proportional if y=kxy=kxy=kx. Or, in words, as xxx increases, yyy increases as well. This is the directly proportional r…
By Daniel Hu, Alex Federspiel, Joshua Siktar
- (Video) Direct and Inverse Proportion by HEGARTYMATHS In this video, HEGARTYMATHS goes over the basics of solving problems involving direct proportionality. If yyy is directly p…
By Alex Federspiel, Zora Gilbert, Joshua Siktar
Problems 21
- Which of the following functions represent directly proportional relationships? Check all that apply.
- Car A travels at 606060 miles per hour and Car B travels at 404040 miles per hour. Both cars travel continuously for 555 hours. How many more miles has Car A traveled than Car B…
- John gets paid 20\2020 per hour. How much would John get paid if he worked 131313 hours?
- You are planning to throw a party for your friends. For every 333 people you invite, you are planning to order 111 pizza. If you invited 212121 people, how many pizzas should yo…
- Sarah is printing a photo for her room. The width and length of the photo varies directly. She can either print a photo with a width of 151515 inches and length of 888 or a phot…
- Shelby bough 4 package of strawberries for 13\1313. How many packages can Faith buy if she has 20\2020? Round down to the nearest whole number.
- Nate is traveling to Mexico tomorrow and had to exchange US dollars to the currency in Mexico (Peso). The exchange rate is 19.0219.0219.02 Pesos to 1\11. How many pesos would Na…
- Jackson can solve 161616 math problems in 2.62.62.6 hours. How many math problems can he solve in 444 hours?
- Ethan was standing beside a street light. He noticed that the street light was casting a shadow that was 13.313.313.3 feet long and his shadow was 2.72.72.7 feet long. Assuming …
- Rachel was drawing a picture of a tree in the park. She drew the tree on a paper of length 555 inches. Rachel drew the tree using a scale of 111 inch to 333 feet. Find the actua…
- The weight of 535353 bags of flour is 265265265 pounds. If the number of bags of flour varies directly to the weight, how much would 676767 bags of flour weigh?
- Jack is planning to set up a wedding for his sister. It costs 50\5050 for refreshments for 606060 guests. At this rate, how much would it cost to serve refreshments for 25025025…
- University of Pittsburgh has a total enrollment of 193261932619326 students. The student to faculty ratio is 14:114:114:1. How many faculty members are at the university?
- Megan is baking cookies. The recipe calls for 222 cups of flour to make 242424 cookies. How many cups of flour does she need to bake 656565 cookies?
- Nicole’s car averages 222222 miles per gallon of gasoline. How many gallons of gasoline does Nicole need for a 180180180 mile trip?
- You are planning to repaint your room that is 500500500 square feet. How many gallons of paint would you need to purchase if 333 gallons of paint cover 100010001000 square feet?
- A 13\1313 tax was charged for a 270\270270 purchase. What would the sales tax be for a 300\300300 purchase?
- The cost of 555 pencils is 3\33. How much would 606060 pencils cost?
- What is the constant variable in this directly proportional function? Number of ShirtsPrice113226339452\begin{array}{|r|c|c|} \hline \text{Number of Shirts}& \text{Price} \\ \hl…
- Which of the following equation(s) is an example of a directly proportional function?
- Which of these graphs represent a directly proportional relationship?