The residual plot for a data set is shown. based on the residual plot, which statement best explains whether the regression line is a good model for the data set and why? a. the regression line is not a good model because some residuals are negative. b. the regression line is a good model because the points in the residual plot are close to the x-axis. c. the regression line is a good model because there is a pattern in the residuals. d. the regression line is not a good model because the points in the residual plot form a curve.

Use this data in the problem below. follow the steps carefully. round to the nearest tenth. lot 3: week 1: 345 week 2: 340 week 3: 400 week 4: 325 step 1. jim enters the data and calculates the average or mean. step 2. jim calculates the deviation from the mean by subtracting the mean from each value. step 3. jim squares each deviation to remove negative signs. step 4. jim sums the squares of each deviation and divides by the count for the variance. step 5. jim takes the square root of the variance to find the standard deviation.

One positive number is 9 more than twice another. if their product is 95, find the numbers

Rob spent 25%, percent more time on his research project than he had planned. he spent an extra h hours on the project. which of the following expressions could represent the number of hours rob actually spent on the project? two answers