Does the table below represent a linear or nonlinear function?

Which of the following correctly justifies statement four of the two column proof? a. corresponding angles theorem b. transitive property of equality c. vertical angle theorem d. substitution property of equality

2/3(-6y+9x) expand each expression using the distributive property

If t17 = 3 (t5) in an arithmetic progression, find t1 in terms of d.