Logarithmic Functions - Answer Key

Today we did a few examples from the class booklet on Log Functions

Example 1: a) v = 3      b) w = 4     c)  x = -4       d) y = 0.83     e)  z = -3
Example 2:  a)  v = 4    b)  w = 2    c)  x = -3       d)  y = 7.39      e)  z = 3
Example 3:  a)  6         b)   3      c)   -2    d)    2      e) 2              f)   12
Example 4: B (Dividing entire logs is not the same as dividing the arguments)
Example 5:  NR x = 32
Example 6:  D
Example 7:  NR x = 1.29
Example 8:  NR x = 4.46

Example 9:  C Logarithmic because the independent variable and dependent variable are interchanged
Enter L1 and L2, Stat Calc 9 (Ln Regression)
y = 32434.05 + -6974.1 lnx

y=  VARS    #5 Statistics > > EQ Enter

Graph with x:{0, 120, 10} & Y: {0, 16000, 1000} for window settings

Example 10
Graph y = 8848 and find intersection at X = 90
Graph y = 1049 and find intersection at X = 30
Subtract to find the difference = 60