To represent the total cost \( c \) of buying 5 slices of pizza at a price of $1.95 per slice, you can use the equation:
\[ c = 5 \times 1.95 \]
This equation indicates that the total cost \( c \) is equal to the number of slices (5) multiplied by the price per slice ($1.95).
None of the provided options directly represent this equation. However, if we rearrange it in terms of total cost:
1.95c = 5 would be incorrect since it would imply each slice costs $c/5.
So, the best way to express it would still be \( c = 5 \times 1.95 \). There isn't a correct representation among your responses that matches this description.