The amount of rainfall over one week is shown in the graph, where is the amount of rain, in centimeters, and is the day of the week. (The interval from 0 to 1 on the t-axis represents the 24-hour period for day 1, the interval from 1 to 2 represents the 24-hour period for day 2, and so on.) a. On what days did it rain? On what day(s) was the rain the heaviest? Explain.

b. On what days did it not rain? Explain.

c. Is it possible for the function to decrease? Explain.

The vertex of this parabola is at (-2, 5). which of the following could be it’s equation? a. y=3(x+2)^2-5 b. y=3(x-2)^2-5 c. y=3(x+2)^2+5 d. y=3(x-2)^2+5

Use sigma notation to represent the following series for 9 terms.

1. why is a frequency distribution useful? it allows researchers to see the "shape" of the data. it tells researchers how often the mean occurs in a set of data. it can visually identify the mean. it ignores outliers. 2. the is defined by its mean and standard deviation alone. normal distribution frequency distribution median distribution marginal distribution 3. approximately % of the data in a given sample falls within three standard deviations of the mean if it is normally distributed. 95 68 34 99 4. a data set is said to be if the mean of the data is greater than the median of the data. normally distributed frequency distributed right-skewed left-skewed