## Brent0423 3 years ago PLEASE HELP ME WITH THIS PROBLEM!!!

1. Brent0423

Some scientists believe that the average surface temperature of the world has been rising steadily. The average surface temperature can be modeled by T = 0.02t + 15.0 where T is the temperature in °C and t is years since 1950. What do the slope and T-intercept represent? (a) The slope represents the increase in the average surface temperature in °C per year, and the T-intercept is the average surface temperature in 1950, or 15°C. (b) The slope represents the decrease in the average surface temperature in °C per year, and the T-intercept is the average surface temperature in 1950, or 15°C. (c) The slope represents the average surface temperature in °C per year, and the T-intercept is the increase in surface temperature in 1950, or 15°C. (d) The slope represents the average surface temperature in °C per year, and the T-intercept is the decrease in surface temperature in 1950, or 15°C. (e) The slope represents the change in the average surface temperature in °C per year, and the T-intercept is the predicted surface temperature in year 2015.

2. Brent0423

3. bloodrain

idk im tryin to figure it out

4. Brent0423

5. campbell_st

ok... if I write the equation y = 0.2x + 15 can you identify the slope and y-intercept..?

6. Shironlom

|dw:1348708493248:dw|

7. Brent0423

(b) Use the equation to predict the average global surface temperature in 2070. (Round your answer to the nearest degree.)

8. hkim

Try to do the math yourself. For the first question, break it down. What does the T-intercept represent with the given problem?

9. Brent0423

0.2 is the slope (0,15) is the y-int

10. campbell_st

the graph looks like |dw:1348708353492:dw|

11. campbell_st

so in your line you have T = 0.02t + 15 so whats the slope and T intercept..?

12. campbell_st

so looking at the line... is it increasing or decreasing.

13. Brent0423

increasing

14. bloodrain

Here is a better graph picture for you. Sorry I didn't help earlier.

15. campbell_st

the slope is increasing...

16. campbell_st

and T is the initial temperature when t = 0

17. bloodrain

I know the answer but I would like you to answer it yourself.

18. bloodrain

Should i give a hint or not?

19. Brent0423

i know the answer is A

20. bloodrain

yes you are right

21. Brent0423

(b) Use the equation to predict the average global surface temperature in 2070. (Round your answer to the nearest degree.)