The graph shows the volume of carbon dioxide gas made in an experiment.

What is the rate of reaction when the time is 15 s?
0.33 cm3/s0.33\text{ cm}^3/\text{s}0.33 cm3/s
3.0 cm3/s3.0\text{ cm}^3/\text{s}3.0 cm3/s
45 cm3/s45\text{ cm}^3/\text{s}45 cm3/s
675 cm3/s675\text{ cm}^3/\text{s}675 cm3/s