Peter's mom wrote down the number of items purchased every week at the grocery store as well as the amount of money she spent. She transferred this information onto a graph. If there are only three people in the family, what would be a reasonable domain for this situation? A. {42, 58, 62, 71} B. {630, 870, 806, 923} C. {0, 16, 4, 9} D. {4, 5, 6, 7}

is there answer choices?

, 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

its adding 5.5 each time

step-by-step explanation: