Discuss three strengths of the linear regression? Identify a peer-reviewed study that uses linear regression in its analysis. Explain why linear regression was used and discuss one challenge in interpreting the results. I 

please check attachment Progress Test 1 (Evaluation 51) covers the course materials that were assigned in Units 1 and 2. Although the progress test is similar in style to the unit evaluations, the progress test is a closed-book test. You may not have access to notes or any of the course materials while you are taking the test. You may also use your graphing calculator on this test.The Summary of Formulas and Trigonometric Tables from the Appendix is included for your use during the test.____ 1.____ 2.____ 3.____ 4.____ 5.0undefined1–1Given a right triangle where side a = 8.0 and angle A = 42°, what does side c = ? Give the result properly rounded off.118.9127.2180°0°270°90°Find the distance between points (–5, –6) and (1, 2). a.b. 10 c.d.A cable on a bridge is connected from the top peak of the bridge to an entrance point. The entrance point is 45 meters south and 21 meters east of the peak. What is the bearing of the cable from the top of its peak?S38°ES13°ES25°ES65°E____ 6.Find the distance between points (4, –2) and (8, 0). a.b. c. d.Perform the indicated operations and give the result with the proper number of significant figures: 4.3 x 12525151.650Use reference angles to find the value of the function: csc 508°−1.88711.60031.88710.5299The reference angle of 212 ° is58°12°138 °32°Use reference angles to find the value of the function: cos 218 °0.78800.6157−0.7880−0.6157Given a right triangle where side a = 12 and side b = 16, what does angle A = ? Give the result properly rounded off.49°41°37°53°undefined1–10____ 7.____ 8.____ 9.____ 10.____ 11.____ 12.