Modeling Data

What type of relationship does this graph have?

• Positive 

• Negative

• No Relationship

• Constant

Describe the correlation coefficient if

r = 0.90

• Positive, weak

• Positive, strong

• Negative, weak

• Negative, strong

A chemist has a 100-gram sample of a radioactive material.  He records the amount of radioactive material every week for 6 weeks and obtains the following data: Find the exponential model of the function.

• y = 100(8.7)^x

• y = 100(1.87)^x

• y = 100(.87)^x

• y = 100(.13)^x

Write the exponential regression equation for this data.

• Y = 8.16(2.7)^X

• Y = 81.6(2.7)^X

• Y = 8.16(.27)^X

• Y = 8.16(27)^X

What is the correlation model of this Graph

• Linear

• Quadratic

• Exponential

• Logarithmic

What is the correlation model of the data set

• Linear

• Quadratic

• Exponential

• Inverse

• Linear

• Quadratic

• Exponential

• Cubic

Determine the Correlation Coefficient and decide whether it is weak, moderate, or strong.

• 0.07 weak

• -0.26 weak

• -0.26 moderate

• 0.07 strong

Determine the Correlation Coefficient and decide whether it is weak, moderate, or strong.

• -0.19 weak

• -0.19 moderate

• 0.04 weak

• 0.04 strong

As x increases, y increases

• correlation coefficient

• causation

• positive correlation

• negative correlation