Match each term on the left with its description on the right. origin each of the four quarters of a plane, as it is divided by the number lines y-axis the vertical number line x-axis the horizontal number line quadrant the place at which the horizontal and vertical number lines cross

i don't even know man. edge inuity be messing with us. i had to ask a question too.

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step-by-step explanation:

, 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

this is a good question! i’ll do some research and what i find, i’ll contact you asap when i have something! ✊