Logarithm Regression

What's the appropriate interpretation of the slope of the regression line?

• For every additional 0.61 hours of growth, the culture is predicted to weight 1 more gram.

• For every additional hour of growth, the culture is predicted to weigh 0.61 more grams.

• For every additional hour of growth, the logarithm of the culture's weight in grams is predicted to increase by 0.61.

• At the beginning of the experiment, the logarithm of the culture's weight in grams was approximately 0.61 ounces.

• The slope decreased and the r² increased.
• The slope increased and the r² decreased.
• The slope decreased but r² remained the same.
• Both slope and r² remained the same.

• A

• B

• C

• D

• E

Solve for x:

• 1

• 2

• .5

• 4

Write a logarithmic equation for the above table of data.

• y = 19.28+17.66ln(x)

• y = 19.28(17.66)^x

• y = 17.66+19.28ln(x)

• y = 19.28(17.66)^x

Write a logarithmic equation for the above table of data.

• y = 8.27(40.52)^x

• y = 40.52(8.27)^x

• y = 8.27+40.52ln(x)

• y = 40.52+8.27ln(x)

What is the end behavior for the function?

• 
• 
• 
• 

Condense

• A

• B

• C

• D

Write log_b(xy) as two logs

• log_bx+log_by

• log_bx-log_by

• log_bx*log_by

• log_bx/log_by

Solve the equation for x.

• 22.198

• e

• 1.131

• 21.66