Linear Equations. Worldwide carbon monoxide emissions are decreasing by about 2.6 million metric tons each year. In 1991, carbon monoxide emissions were 79 million metric tons. Use a linear equation to model the relationship between carbon monoxide emissions and time. Let x=91 correspond to 1991.

I need help writing the appropriate linear equation. If there are multiple answers, I will mark one Brainliest. Thank you!