IM1 Unit 2 Quiz Corrections

Match the vocabulary words with the correct image

• continuous domain

• 
• discrete domain

• 
• y-intercept
  (growth factor)

• 
• common ratio
  (growth factor)

• 

Tags

CCSS.HSF-IF.C.7E

The graph shows a relationship between the number of bracelets sold and the amount of money earned. This graph is​ (a)   since we are ​ (b)   the number of bracelets sold.

• discrete
• counting
• continuous
• measuring

Answer explanation

Discrete functions are used for things that can be counted. For example, the number of televisions or the number of puppies born.

Tags

CCSS.8.EE.B.5

The graph shows a relationship between the number of weeks and the weight of a growing puppy. This graph is​ ​ (a)   since we are ​​ (b)   the weight of the puppy over time.

• continuous
• measuring
• discrete
• counting

Answer explanation

Continuous data usually requires a measuring device. (Ruler, stop watch, thermometer, speedometer, etc.)

The puppy is growing in between the weeks, so even though we only measure at 0, 4, and 8 weeks, the puppy is growing in between the weeks, so we connect the points.

Tags

CCSS.8.EE.B.5

Label the diagram

a

common ratio

horizontal asymptote

y-intercept

first term

Answer explanation

y intercept is the point where the line or curve intersects the y-axis

Tags

CCSS.HSF-IF.C.7E

• 2
• 3
• x

Answer explanation

Tags

CCSS.HSF.LE.B.5

Scientists discovered that Folsom Lake is contaminated with bacteria!  When biologists started measuring the bacteria, there was an area of 4 square feet of bacteria in the lake. This contaminated area is doubling  (multiplying by 2) every day!  Complete the table to represent the scenario.

a

b

c

20

64

16

12

32

Answer explanation

the area is DOUBLING (multiply by 2) so the f(x) values should be multiplying by 2

Tags

CCSS.HSF.BF.A.2

Scientists just discovered that Lake Tahoe is contaminated with bacteria!  When biologists started measuring the bacteria, there was an area of 4 square feet of bacteria in the lake. This contaminated area is doubling  (multiplying by 2) every day! 

Which graph correcting represents the scenario?

• 
• 
• 
• 

Answer explanation

we are measuring, so the graph should be continuous

we are multiplying, so the graph should be an exponential curve

Tags

CCSS.HSF-IF.C.7E

Scientists just discovered that Lake Tahoe is contaminated with bacteria!  When biologists started measuring the bacteria, there was an area of 4 square feet of bacteria in the lake. This contaminated area is doubling  (multiplying by 2) every day! 

Which equation correctly represents the scenario?

Tags

CCSS.HSF.LE.A.2