Step 4: Average rate of gghange (4 gts} Compute the average rate of change per year of the cost over each time period. Just fill In the result; don*t+ shovv the calculation. pm dollars 1970 m: Do these values suggest a linear trend? Explain. Step 5: Linear Modeling {6 pts] Assuming that the trend is linear, generate a linear model. To make the calculation easier, rascals the tlme values for EDUQ through 2015 in the above table. Let EODQ be the year t]. \fUelng any two data points from the reeceled tabla develop a possible linear model of the above data by lling in the blanks in the following calculation. {9.2.25} andlj . ] P=m+b P=m+? (a) Predlct the price In 2020 For BUB. t = ? P = ?{ :2 3+ ? p = According to this model, the Price is expected to be about $ in the year 201 B