Proportional Relationships
What is the constant of proportionality in the equation y = 5x?
Answer: 5
Simplify: 12/18
Answer: 2/3
What is the mode of the numbers: 3, 4, 6, 4, 2?
Answer: 4
120 miles in 2 hours = how many miles per hour?
60 mph
The opposite of –7 is?
7
If 3 pencils cost $1.20, how much do 10 pencils cost?
$4.00
Add: 3/4 + 2/3
17/12 or 1 5/12
Find the median of: 8, 10, 4, 12, 6.
Answer: 8
150 words in 3 minutes = how many words per minute?
50 wpm
Solve:|–12|
Answer: 12
A recipe calls for 2 cups of sugar for every 5 cups of flour. Write the ratio of sugar to flour.
2:5
Multiply: 7/8 × 4/5
28/40 = 7/10
A set has mean 20. The numbers are 15, 25, and x. Find x.
Answer: 20
A car uses 12 gallons to go 360 miles. What is the unit rate?
Answer: 30 mpg
Simplify: (3 × 4) + (2 × 5)
22
Graph (4,12), (6,18), and (8,24). Is this proportional?
Yes, because y/x = 3 is constant.
Divide: 5/6 ÷ 2/3
15/12 = 5/4 = 1 1/4
The probability of rolling a 3 on a number cube (1–6).
Answer: 1/6
If 5 kg of apples cost $12.50, what is the cost per kg?
$2.50 per kg
Convert 0.75 into a fraction.
3/4
The ratio of boys to girls in a class is 4:5. If there are 36 students, how many are boys?
16 boys
A pizza was cut into 12 slices. If Ana ate 1/4 of the pizza, how many slices did she eat?
Answer: 3 slices
A survey shows 12 students like soccer, 8 like basketball, and 10 like volleyball. What percent like basketball?
8/30 = 26.7%
A runner completes 10 laps in 25 minutes. How many minutes per lap?
2.5 minutes per lap
Solve: 2x + 5 = 17
x = 6