Reputable scientists know that the average surface temperature of the world has been rising steadily. The average rate of change is about 0.02$\displaystyle Ëš{C}$ per year and the average global surface temperature in 1950 was about 14 ËšC.

Let $\displaystyle {T}$ be the average global surface temperature in $\displaystyle Ëš{C}$ and $\displaystyle {t}$ be the number of years since 1950.

1. State an equation to model this situation: Preview Question 6 Part 1 of 6  
2. The equation is in the Select an answer quadratic exponential linear family
3. Which statement is the best interpretation of the slope in this situation?
   
   • The average global surface temperature is about 14 ËšC.
   • The average global surface temperature is rising by about 1ËšC each 0.02 years.
   • The average global surface temperature is rising by about 0.02 ËšC each year.
4. Which statement is the best interpretation of the y-intercept in this situation?
   
   • The average global surface temperature was about 14 ËšC in 1950.
   • The average global surface temperature was about 14 ËšC in the year 0.
   • The average global surface temperature is about 14 ËšC.
5. Use the equation to predict the average global surface temperature in 2008.
   $\displaystyle Ëš{C}$
6. According to this model, in what year will the average global surface temperature reach about 16.1$\displaystyle Ëš{C}$?
   round to the nearest year

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