Erin writes the set of ordered pairs below. The set represents a function.
{(3, –3), (5, 0), (–1, 4), (–6, 7)}
Erin claims that she can add any point to the set and have the set still represent a function.
Which of the following points can be used to show that Erin's claim is incorrect? Select three that apply.
A.(–6, 1)
B.(–1, 9)
C.(0, 5)
D.(1, 7)
E.(3, –2)

hello from mrbilldoesmath!

answer:

a(n) - a(n-1) -3

discussion:

this ones a bit interesting. given a(n) = 5 - 3n consider this:

a(n-1) = 5 - 3(n-1)

          = (5 - 3n) + 3             => but a(n) = 5 - 3n, the first term

          = a(n)   + 3                 => subtract 3 from both sides

a(n-1) -3 = a(n)  

or

a(n) - a(n-1) -3

you,

mrb

4x and 6y

im not sure though

answer: sorry i can't you.

step-by-step explanation:

nothjing

step-by-step explanation: