Transcript Reg Solve Graphically (with Calculator)

Reg Algebra 2 – Unit 2
Solve Systems
Graphically
(With Calculator)
Sketch the 3 possible solution
scenarios of a system of linear
equations.
Solve by Graphing
Why would these not be easy to solve
graphically (by hand)?
y  3.1x  9.2
y  5.6 x  11
y  2x  3
y  5 x  9
y  5 x  100
y  10 x  50
Solve Graphically
(with Calculator)
Rent-A-Truck charges $29.95 per day and $0.43
per mile to rent a vehicle and Borrow-My-Truck
charges $45.00 per day and $0.32 per mile. For
what number of miles will the rental cost be the
same at both companies?
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Set up the system of equations.
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Solve Graphically
(with Calculator)
Enter the equation for Rent-A-Truck into y1 and enter the
equation for Borrow-My-Truck intoy2. Adjust your window
setting so that you can see the intersection point on your
calculator screen. Sketch you graph.
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Find the intersection using the following steps:
o
o
o
o
Press the 2nd key, then the TRACE key.
You want to go to number 5 for intersect.
Next, press ENTER three times; for first curve,
second curve and for the calculator to estimate the solution.
Label the intersection point on your graph.
Solve Graphically
(with Calculator)
What does the point of intersection represent in the
truck rental situation?
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Which truck rental business offers the better deal?
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