The correct two-way frequency table for the date will look like this:
RAP ROCK COUNTRY TOTAL
Grades 9-10 40 30 55 125
Grades 11-12 60 25 35 120
TOTAL 100 55 90 245
The sum of the row total is equal to the sum of the column total
125 + 120 = 100 + 55 + 90
245 = 245
$23.58 divided by 12 = $1.965
Each roll is about $1.97 (if you round up)
If you mean intersecting lines then...
Answer:1/2 slope
Step-by-step explanation: