Help pls ill give extra points :))

Which of the following is best modeled using a linear equation y=ax+b, where a is less than 0?

What are linear equations? could'ya explain too me, ? ! and how do you see what graph is a proportional relationship?

Analyze the diagram below and complete the instructions that follow. 56 find the unknown side length, x write your answer in simplest radical form. a 2047 b. 60 c. sv109 d. 65 save and exit next s and return