Name:_________________________________________
Date:________ Period:______
Weekly #4
Weekly #4
Complete all questions. Show all work, including formulas. A correct answer with no work shown will not
receive any credit! If there is no work to show, please write a definition.
1.) Graph and write the solution set of |2x + 3| < 9
2.) Factor the expression completely: 5x3 – 45x
3.) Which function is NOT one-to-one?
(1) {(4, 5), (3, 6), (-2, 1), (-5, 4)}
(3) {(1, 1), (2, 2), (3, 3), (4, 4)}
(2) {(-10, 1), (2, 3), (4, 1), (-1, -1)}
(4) {(1, 2), (3, 4), (5, 6), (7, 8)}
4.) The table below summarizes the average annual ticket sales in thousands of dollars for the local
baseball team.
Year
Cost
1
15.2
2
15.9
3
16.1
4
16.8
5
17.3
6
17.9
7
18.1
8
18.6
9
19.0
(1) Find the linear equation of best fit for the given data. Round decimals to three places.
(2) Find the correlation coefficient “r” correct to 4 decimal places for part (1).
(3) Use the equation of best fit in part (1) to estimate the average ticket sales for the baseball team in
year 15.
5.) Two forces have magnitudes of 35 pounds and 80 pounds respectively, and act upon a body at an
angle of 84⁰ between them. Find, to the nearest whole pound, the resultant force.