If 1990 is x = 0, then 1997 is x = 7.
Use x = 7 in the equation for the number of taxi accidents.
Answer:
D. 16.7%
Step-by-step explanation:
Rate of return is:
R = (Vf - Vi) / Vi
R is the rate of return, Vf is the final value, and Vi is the initial value. Essentially, you're finding the change in value and dividing by the initial value.
R = (1750 - 1500) / 1500 = 0.167 = 16.7%
Make sure that you divide by the initial value, not the final. If you divided by 1750 instead, you would have gotten 14.3% which is not correct.
Make sure you check your sign as well. The value increased, so the rate of return is positive.
The interquartile range is 12.5.
We first find the median. To do this, order the data from least to greatest and find the middle value:
72, 80, 81, 84, 92, 92, 94, 95
There are 8 data values. The median is between 84 and 92:
(84+92)/2 = 176/2 = 88
The median splits the data into two halves. The lower quartile is the median of the lower half; this is between 80 and 81:
(80+81)/2 = 161/2 = 80.5
The upper quartile is the median of the upper half; this is between 92 and 94:
(92+94)/2 = 186/2 = 93
The interquartile range is found by subtracting these:
93-80.5 = 12.5
What do you mean by group these numbers
