geno3141

In this case "between" does not mean to include the endpoints; so find the height of the bar for 15mph ...

Press (2nd) then (atan) then enter the value ...

If the weights are in the same proportion as their scale:

Matchbox/Real  --->   1/63  =  x/4750

Cross multiplying  --->  63·x = 1·4750

                                       63x  =  4750

                                           x  =  4750/63  =  75.4 oz                 (very unrealistic)

There are two choices for the first question:  T or F

There are two choices for the second question: T or F

Etc.

To find the total number of ways the test can be answered, multiply all the individual choices together:

--->  2 x 2 x 2x ... x 2          (twenty times)

How many cars are in the bar representing 20-25 mpg?                              <---  the height of the bar 

How many cars are in the bar representing 25-30 mpg?

How many cars are in the bar representing 30-35 mpg?

How many cars are in the bar representing 35-40 mpg?

How many cars are in the bar representing 40-45 mpg?

Find those individual answers and add them together ...

Formula for slope:  m  =  (y2 - y1) / (x2 - x1)

(x1, y1) = (5, 8)   --->   x1 = 5, y1 = 8

(x2, y2) = (1, 7)   --->   x2 = 1, y2 = 7

--->   m  =  (7 - 8) / (1 - 5)  =  -1/-4  =  1/4

To find the median weight, list the weights for Vet-1 from smallest to largest (if there are an even number of weights, find the middle value between the middle two weights). Then do this for Vet-2 and compare your answers.

To find the mean weight, add all the weights for Vet-1 and divide by the number of weights for that vet. Do the same for Vet-2 and compare your answers.

To find the range, subtract the smallest number from the largest number for Vet-1. Do the same for Vet-2 and compare your answers.

The mode is the number used most often for each vet. If every number is used only once, there is no mode. There can be two modes, if two numbers are tied for greatest usage.  

The median number is the number in the middle of a list when the list has been orgainized from smallest to largest.

In case of an even number of numbers, find the number that is halfway between the middle two numbers.

Another way to say this is to find the mean of the middle two numbers.

The middle two numbers are 35.90 and 45.98.

To find the mean of these two numbers, add them together and divide by 2:  (35.90 + 45.98) / 2

However, this isn't one of the choices ... did you forget to enter the fourth choise?

Range is usually defined as the largest number minus the smallest number.

What is the largest number?

What is the smallest number?

Subtract ...

Since the population is increasing from year to year, if you want to describe the change in population, subtract the beginning population from the final population. Which summary describes this subtaction?