The domain is an interval. the domain is the function is (answer.)
the domain is a list of values. the domain of the function is (answer.)

Domain :Set of all real values

Range : -5

Step-by-step explanation:

Here we see the blue line. Assuming it to be the graph of the function we are about to find Domain for.

Here we see that the graph is a straight line , parallel to x axis at y=-5

Hence the function will be

f(x)=-5

Also for every values of x, y =-5. Hence it is defined for all values of x. So the Domain is Set of All Real numbers

However,

For every value of x, the value of y is constant that is -5. Hence The range of f(x)=-5 is {-5}

, and

for

step-by-step explanation:

we can analyze the pattern at which the terms increase. let us denote , , , so that we can call

note the following:

the pattern: to get the next term value, we just add the next term number (e.g. 1st, 2nd, to the previous term value (term values are the given numbers in the question, 1, 3, 6, 10, 15,

from , to get to , we add

from , to get to , we add

etc.

we need to form a recursive formula, a formula that has the next term as a function of the previous term. so a possible recursive formula can be

, and for