What is the value of the function y=3r−1 when r = -1

−8

−4

2

6

If these are all separate answers, then: y=3r-1

Substitute r for the value it's asking for.
 
R=-1
y=3(-1)-1
(Answer) y=-4
 
R=-8
y=3(-8)-1
y=-24-1
(Answer) y=-25

R=-4
y=3(-4)-1
y=-12-1
(Answer) y=-13

R=2
y=3(2)-1
y=6-1
(Answer) y=5
 
R=6
y=3(6)-1
y=18-1
(Answer) y=17


 
I hope this helps. Apologies if you're looking for something else.

It says in the questions that it is 6.5?