Write a function rule to represent the sequence.

0.3, 0.9, 1.5, 2.1,...

A(n) = 0.6 + (n - 1)0.3
A(n) = 0.6 - (n)0.3
A(n) = 0.3 + (n - 1)0.6
A(n) = 0.3 + (n + 1)0.6

Write a function rule to represent the sequence.

47, 32, 17, 2,...

A(n) = 47 + (n - 1)15
A(n) = 47 + (n - 1)(-13)
A(n) = 47 + (n - 1)(-15)
A(n) = 32 + n - 1)15

I can tell the difference of the numbers between both the questions, but when I try to plug in the values into the equation, I'm not getting it right:/ Please help?

They're both C

This is stupid. Why should you have to do a bunch of unnecessary steps to figure out what number comes next when we can easily keep it basic and still figure out the right answer?

ITS COMPLETELY WORTHLESS AND JUST MAKES YOUR HEAD SPIN!!!

Y E E is correct!

Thank you guys hall help me alot

yes c is right

FULL PRACTICE

1. 18, 22
2. -14, -20
3. 20,000, 200,000
4. 5.5, 6.6
5. B
6. A
7. B
8. A
9. C
10. C

nevermind i got it:p

#1 clearly A grows by 0.6 for each new term.

suppose A(n) = 0.6(n-1)

But, when n=0, A(0) = 0.3 so just add that at the start.

A(n) = 0.6(n-1) + 0.3

#2 A(n) starts at 47 and drops by 15, so start with

A(n) = 47-15(n-1)

The (n-1) stuff pops up because the first term (n=1) has not yet added or subtracted anything. If the sequence started with A0 instead of A1, then that would not be necessary.

Huh.

i would post answers but the practice would not show them.