To model the temperature \( y \) in degrees Fahrenheit after \( x \) hours, we start with the information given:
- The initial temperature at sunrise (when \( x = 0 \)) is 36 degrees F.
- The temperature rises by 6 degrees F each hour.
Using the slope-intercept form of a linear equation, which is \( y = mx + b \):
- \( b \) is the initial value (the y-intercept), which is 36 degrees.
- \( m \) is the rate of change, which is 6 degrees per hour.
Thus, the equation that models the temperature \( y \) after \( x \) hours is:
\[ y = 6x + 36 \]
Part 2: Graph of the Equation
To graph the equation \( y = 6x + 36 \):
-
Identify the y-intercept: The y-intercept is 36 (this is where the line crosses the y-axis when \( x = 0 \)).
-
Find another point using the slope: The slope is 6, meaning for every 1 hour increase (1 unit increase in \( x \)), \( y \) increases by 6 degrees F.
- For \( x = 1 \): \[ y = 6(1) + 36 = 6 + 36 = 42 \]
- So, the point (1, 42) can also be plotted.
-
Draw the Line: Now you can plot the points (0, 36) and (1, 42) on a graph and draw a straight line through them extending in both directions.
This will give you the graph of the equation \( y = 6x + 36 \). The line will rise steeply due to the slope of 6, indicating a rapid increase in temperature.
Summary
The equation modeling the temperature after \( x \) hours is:
\[ y = 6x + 36 \]