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The problem states that for every 2 psi drop in pressure, the temperature rises by 3 degrees. This indicates a linear relationship between temperature and pressure, T = mP + c.
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Question 3
1. Derive the formula which shows the interrelationship between pressure and temperature.
Let be the pressure in psi and be the temperature in degrees.
The problem states that for every 2 psi drop in pressure, the temperature rises by 3 degrees. This indicates a linear relationship between temperature and pressure, .
Step 1: Determine the slope ().
The change in pressure is psi (pressure drops).
The change in temperature is degrees (temperature rises).
The slope is given by:
Step 2: Use the given point to find the y-intercept ().
We are given that when the pressure is psi, the temperature is degrees.
Substitute these values and the slope into the linear equation :
Step 3: Solve for .
Step 4: Write the final formula.
Substitute the slope and the y-intercept into :
The formula showing the interrelationship between pressure and temperature is:
2. Draw the graph of the above function, show the intersection points on the graph with the axes precisely.
The function is .
To draw the graph, we find the intercepts with the axes.
Step 1: Find the T-intercept (where ).
Substitute into the equation:
The T-intercept is .
Step 2: Find the P-intercept (where ).
Substitute into the equation:
Add 9 to both sides:
Multiply by to solve for :
The P-intercept is .
Step 3: Draw the graph.
Plot the two intercepts and and draw a straight line through them.
The horizontal axis represents Pressure ( in psi) and the vertical axis represents Temperature ( in degrees).
^ T (degrees)
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