Counting the number of tiles with vowels is much easier.

Out of the 100 tiles, there are nine "A" tiles, twelve "E" tiles, nine "I" tiles, eight "O" tiles, and four "U" tiles. This is a total of 

tiles out of 100. 

There are also two blanks, so the number of tiles marked with consonants is 

56 out of 100 is 56%.

Examining the high temperature line, it can be seen that, among the four choices given, only the segment connecting Monday to Tuesday has a positive slope (lower left to upper right). 

Therefore, of the four choices, Monday to Tuesday is correct.

There are nine "A" tiles, twelve "E" tiles, nine "I" tiles, eight "O" tiles, and four "U" tiles. This is a total of 

vowel tiles. 

Out of these tiles, 9 are marked with an "E"; this is

.

This rounds to 21%.

As can be seen below, the highest temperature for the week was 78 degrees Fahrenheit, on Tuesday.

To convert this to degrees Celsius, set  and substitute in the given formula:

. The correct choice is .

As can be seen in the diagram below, the high and low temperatures on Wednesday were, respectively, 74 and 60 degrees, for a drop of  degrees.

This drop occurred over a period of  hours, for an average drop of

degrees per hour. The quotient of this is seen below:

This rounds to 1.3 seconds.

There are nine "A" tiles, twelve "E" tiles, nine "I" tiles, eight "O" tiles, and four "U" tiles. This is a total of 

There are also two blanks, so the number of tiles marked with consonants is 

.

For the probability of drawing a vowel tile to be , the ratio of consonant tiles to vowel tiles must be

 - that is, 2 to 1.

If we let  stand for the number of vowel tiles to be added, then 

 vowel tiles.

Recall that the mode is the number that appears most often in a data set.

For this class,  students only have  sibling. Thus,  appears the most often in this data set.

To find the median you need to arrange the values in numerical order.

Starting with this:

Rearrange to look like this:

If there are an odd number of values, the median is the middle value. In this case there are 8 values so the median is the average (or mean) of the two middle values.

The median of nine (an odd number) integers is the one in the middle when the numbers are arranged in ascending order; in this case, it is the fifth lowest. Since the nine integers are consecutive, the greatest integer is four more than the median, or .

We know that the numbers should be arranged in ascending order to find the median. When the number of values is odd, the median is the single middle value. In this question we have consecutive integers with the median of . So the median is the number in the rearranged data set. Since the integers are consecutive, the smallest integer is five less than the median or it is equal to .