To find the 4th term of the sequence defined by the formula \( c(n) = -7 + 6(n - 1) \), we can substitute \( n = 4 \) into the formula.
\[ c(4) = -7 + 6(4 - 1) \]
Calculating \( 4 - 1 \):
\[ 4 - 1 = 3 \]
Now substitute this value back into the equation:
\[ c(4) = -7 + 6 \cdot 3 \]
Now calculate \( 6 \cdot 3 \):
\[ 6 \cdot 3 = 18 \]
Now combine the values:
\[ c(4) = -7 + 18 \]
\[ c(4) = 11 \]
Thus, the 4th term in the sequence is \( \boxed{11} \).