The data is given to an eager NWIC statistics student who calculates the following information: Correlation Coefficient: r = -0.80
Trend Line: y = -0.1 * x + 18 where x = mileage and y = sale price
a. What is the slope of the trend line? Interpret this value in terms of mileage and sale price.
b. Is the relationship between mileage and sale price positive or negative? Why?
c. Suppose a car had 50,000 miles on the odometer. What is the prediction for the sale price? How confident would you be about this prediction? Why?
d. Suppose a car is taken in trade that has 95,000 miles on it. What is the predicted sale price? How confident would you be about this prediction? Why?

The weight of 46 new patients of a clinic from the year 2018 are recorded and listed below. construct a frequency distribution, using 7 classes. then, draw a histogram, a frequency polygon, and an ogive for the data, using the relative information from the frequency table for each of the graphs. describe the shape of the histogram. data set: 130 192 145 97 100 122 210 132 107 95 210 128 193 208 118 196 130 178 187 240 90 126 98 194 115 212 110 225 187 133 220 218 110 104 201 120 183 124 261 270 108 160 203 210 191 180 1) complete the frequency distribution table below (add as many rows as needed): - class limits - class boundaries - midpoint - frequency - cumulative frequency 2) histogram 3) frequency polygon 4) ogive