Question

This equation shows how the cost of Devon's graduation picnic depends on the number of attendees.

d = 6a

The variable a represents the number of attendees, and the variable d represents the cost in dollars. If there are 3 attendees, how much will Devon's graduation picnic cost?

$

Answer 1

To find the cost \( d \) of Devon's graduation picnic when there are 3 attendees \( a \), you can substitute \( a = 3 \) into the equation \( d = 6a \).

\[
d = 6 \times 3
\]
\[
d = 18
\]

Therefore, the cost of Devon's graduation picnic for 3 attendees will be \( \text{\$}18 \).