Answer:
D
Step-by-step explanation:
A(n) = a(n-1)+9 means that we add 9 to the previous term to get the next term. Therefore the common difference is d = 9 this sequence is arithmetic.
The first term is a(1) = 21
Plug those two values into the arithmetic formula below and simplify
a(n) = a(1) + d * [ n - 1 ]
a(n) = 21 + 9 * [ n - 1 ]
a(n) = 21 + 9*n + 9*(-1)
a(n) = 21 + 9n - 9
a(n) = 9n+12
Answer is choice D
Answer:
In order to find the y-intercept you need to first get y by itself
To do so we need to divide y by 4, since we divide one side by four we need to divide the other side by 4 also
4y/4=x/4-24/4
y=1/4x-6
Now in the formula y=mx+b, you b is the y-intercept
In y=1/4x-6, the spot filled in for b is -6
Therefore; you y-intercept would be -6
-6
Hope this helps ;)
The slope-intercept of the line is
y= -2/3x + 2
Going up 2, left 3
Change in y
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change in x
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