For which table(s) of values in Exercises 39–42 is the relationship

Question

linear? Tell how you decided. Write the equation for each linear
relationship.

x 5 10 15 20 25 30
y 20 30 40 50 50 50

I understand this is not linear function but what is it asking me to do next.

Answer 1

change in y/change in x = constant slope if linear

(30-20)/(10-5) =2

(50-50) /(30-25) = 0 which is not 2

Answer 2

Thank you so much