Chlorofluorocarbons (CFCs) were created in $1928$ and were used in products such as aerosol propellants, cleaning solvents and refrigerants. It has since been proved that CFCs contribute to the destruction of the ozone layer. They continued to accumulate in our atmosphere until a global decision was made to address his potentially catastrophic issue.

A graph that contains two sets of trends, like this one can be referred to as a piecewise relationship.

According to the graph, what was the rate of change in CFC concentrations in the atmosphere leading up to the global ban? Verify your answer using different points on the graph. Discuss any discrepancies you may have.

Chlorofluorocarbons (CFCs) were created in $1928$ and were used in products such as aerosol propellants, cleaning solvents and refrigerants. It has since been proved that CFCs contribute to the destruction of the ozone layer. They continued to accumulate in our atmosphere until a global decision was made to address his potentially catastrophic issue.

A graph that contains two sets of trends, like this one can be referred to as a piecewise relationship.

According to the graph, what was the rate of change in CFC concentrations in the atmosphere after the global effort started? Verify your answer using different points on the graph. Discuss any discrepancies you may have.

Chlorofluorocarbons (CFCs) were created in $1928$ and were used in products such as aerosol propellants, cleaning solvents and refrigerants. It has since been proved that CFCs contribute to the destruction of the ozone layer. They continued to accumulate in our atmosphere until a global decision was made to address his potentially catastrophic issue.

A graph that contains two sets of trends, like this one can be referred to as a piecewise relationship.

Although much has been accomplished, CFCs decompose very slowly, so even when all CFC production has stopped (Which is not yet the case), some concentration of CFCs will remain in the atmosphere for over $100$ years. According to the decreasing trend, in what year will there be zero CFCs left in the atmosphere?

Find the equations of the lines shown on the set of axes below.

Find the equation of the line through $\left(6,1\right)$ that is parallel to the line $y=34$.

Find the equation of the line through $\left(0,1\right)$ that is perpendicular to the line $x=-2$.

Find the equation of the line through $\left(5,5\right)$ and $\left(5,-2\right)$.

Find the equation of the line through $\left(-3,-2\right)$ and $\left(1,-2\right)$.

Find the equation of the line through $\left(4,2\right)$ that is parallel to the line $x=-8$.