To write a direct variation equation for the distance traveled by a jet flying at a rate of 600 mph for 3 hours, you can use the formula:
\[ y = kx \]
where \( k \) is the rate (600 mph) and \( x \) is the time in hours. In this case, if \( x = 3 \), the equation would look like:
\[ y = 600 \times 3 \]
So the correct response is:
y = 600 × 3 (y equals 600 times 3).