The cost of a pencil is described by the equation y=$0.19x

To find the cost of one pencil using the equation \( y = 0.19x \), you need to substitute \( x = 1 \) (since you want the cost for one pencil).

So,

\[
y = 0.19 \times 1 = 0.19
\]

The cost for one pencil is \( \$0.19 \).