I’m stuck on this question

-1 to 3

Step-by-step explanation:

When the function is constant, it'll be a horizontal straight line. On the graph of the line where there are no increases or decreases begins at -1 and ends at 3.

5,14,23

Step-by-step explanation:

arithmetic  sequences are in form:

a(n)=a(o)+d(n-1)

substitute a(3)=23 and a(26)=230

solve and gives

d=0

a(0)=5

a=5+9(n-1)

a(1)=5

a(2)=14

a(3)=23