$\"\"$ \

(a)

\

The temperature function is $\"\"$ .

\

The slope - intercept form of a line equation is $\"\"$ ,

\

where $\"\"$ is the slope and $\"\"$ is the $\"\"$ intercept.

\

Compare the temperature equation with slope-intercept form of the line equation.

\

Slope is $\"\"$ and $\"\"$ intercept is $\"\"$ .

\

Slope represents the rate of change of temperature with respect to time is $\"\"$ .

\

$\"\"$ intercept represents that the temperature in 1900 is $\"\"$ .

\ $\"\"$ \

(b)

\

$\"\"$ represents years since 1900.

\

Find the average global surface temperature in 2100.

\

Years since 1900 is $\"\"$ .

\

Substitute $\"\"$ in the equation $\"\"$ .

\

$\"\"$

\

The expected temperature in 2100 is $\"\"$ . \ \ $\"\"$

\

(a) Slope represents the rate of change of temperature with respect to time is $\"\"$ .

\

$\"\"$ intercept represents that the temperature in 1900 is $\"\"$ .

\

(b) The expected temperature in 2100 is $\"\"$ .

\