constant rat eof change

Quiz by Elaine Courtney

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23 questions
• Q1
a ratio that compares a quantity to one unit of a different quantity
Unit Rate
30s
• Q2
Comparison of two quantities
Ratio
30s
• Q3
The constant ratio between two quantities: y=kx, where k is the constant of proportionality.
Constant of Proportionality
30s
• Q4
Change in y/ Change in x
Rate of Change
30s
• Q5
See image
A climber is on a hike. After 2 hours he is at an altitude of 400 feet. After 6 hours, he is at an altitude of 700 feet.
30s
• Q6
75 ft
What is the average rate of change?
30s
• Q7
See image
A scuba diver is 30 feet below the surface of the water 10 seconds after he entered the water and 100 feet below
30s
• Q8
-2.33 ft/sec
the surface after 40 seconds. What is the scuba divers rate of change?
30s
• Q9
2 miles/minute or .033 miles per second
A rocket is 1 mile above the earth in 30 seconds and 5 miles above the earth in 2.5 minutes. What is the rockets rate of change in miles per second? What about miles per minute.
30s
• Q10
+4 pounds per year
A teacher weighed 165 lbs in 1996 and weighs 205 lbs in 2006. What was the rate of change in weight?
30s
• Q11
+.05 degrees each year
Let's pretend that over the last 50 years, the average temperature has increased by 2.5 degrees worldwide. What is the rate of change in worldwide temperatures per year?
30s
• Q12
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A plane left Chicago at 8:00 A.M. At 1: P.M., the plane landed in Los Angeles, which is 1500 miles away. What
30s
• Q13
300 miles per hour OR
was the average speed of the plane for the trip?
30s
• Q14
See image
5 miles per minute
30s
• Q15
2
If k=y/x and the rate is 6:3. Then the constant is =
30s

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