Sally has been running the following number of ads in the local newspaper to help attract customers into her store. She has also been keeping track of customers who have come into the store as a result of the ads, as well as the amount of money they spend. This is the data from the last 4 weeks: Number of ads 16 Increased sales 330 12 270 18 380 14 300 i. Determine the equation that relates ads and increased sales. ii. If Sally runs 15 ads, how much will sales increase?

Sarah was calculating the speeds (mph) of vehicles travelling down Maple Street on two separate days at 9 am for an hour. Below is the data she collected. Wednesday's Speeds: Sunday's Speeds: 34,28,24,17,39,44,64,33,27,21,38,40,60,30,25,37,30,25,35,30 18,27,34,37,49.55,63,61,48,30,27,17,17,15,26,46,25 4) Find the Standard Deviation of each day. Wednesday's Standard Deviation Table X x (x-)²2 n-l Sunday's Standard Deviation Table 7 (x-2)² n-1 2). Sketch Wednesday's Bell Curve with 30 Sketch Sunday's Bell Curve with 30 (x-7)²= x-F (x-7) 2 3. Based on your analysis of the data and standard deviations, which day would you say is the most dangerous day on Maple Street?

The owner of a radio station wants to determine how much airtime songs take up. The owner collects the song length in seconds of 10 popular songs. The data are reproduced in the table below. Calculate the mode(s) using a TI-83. TI-83 plus, or TI-84 graphing calculator. Length of Songs in Seconds 279 219 298 134 206 293 165 227 230 212

With the rise of e-books and online retailers, the demand for physical bookstores has been declining. The number of bookstores from 2008 through 2013 (in hundreds) are shown in the following table (x = 0 corresponds to 2008): Year 0 1 2 3 4 5 Number of Bookstores 4.2 3.8 3.4 3.0 2.6 2.2 Using the equation, estimate the number of bookstores in 2016. Group of answer choices 200 300 100 400