Which equation has (2, -1) as a solution
a. y = 2x - 1
b. y = x + 3
c. y = x - 3
d. y = - 2x + 1

C.

Step-by-step explanation:

To find the answer to the problem, you plug in the values for and .

Let's plug them in and see which equation is true.

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         Not true.

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         Not true.

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         True.

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         Not true.

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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

d is correct

step-by-step explanation: