To identify the equation that represents the sequence 3, 9, 27, 81, we first need to analyze the pattern in the sequence.
- The first term is 3.
- The second term (9) is \(3 \times 3\) or \(3^2\).
- The third term (27) is \(3 \times 3 \times 3\) or \(3^3\).
- The fourth term (81) is \(3 \times 3 \times 3 \times 3\) or \(3^4\).
This shows that the general term of the sequence can be expressed as \(3^x\) where \(x\) starts from 1 for the first term.
Therefore, the correct equation that represents this sequence is:
y = 3^x
The correct response from the options given is:
y = 3^x (xy is equal to 3 to the x th power)