Question

The expression 2(x-1)+3 can be used to determine how many people RSVP to an invitation after x number of days. Which of the following statements is/are false? Be sure to select all that apply.

A: After 7 days, 12 people RSVP.
B: The number of people who RSVP decreases by 1 each day.
C: After the first day, 3 people have RSVP’ed to the invitation.
D: The number of people who RSVP increases by 2 people each day.

Answer 1

the answer is D

if you replace x by 1 the answer is 3

if you replace x by 2 the answer is 5

if you replace x by 3 the answer is 7

etc...

Answer 2

Answer: D

Explanation:

given that no of days=x

let no of people=n

n=2(x-1)+3

at x=1, n=3

at x=2, n=5

at x=3, n=7

this shows an increase of 2 for every increase in the number of days