±
Kendra Kilmer August 18, 2011
Section 1.4 Intersection of Straight Lines
Calculator Steps:
•
Graph the two functions by entering the slopeintercept form of the lines into Y1 and Y2 (These are located under
the Y= button). After chosing the appropriate Window, hit GRAPH.
•
Go to CALC which is found by pressing 2nd TRACE.
•
Select option 5: intersect
•
The calculator will prompt you for the ﬁrst and second curves you want to intersect. The cursor will blink on a
function and show the function name in the top left corner of the screen. When it blinks on Y1, press enter and
when it blinks on Y2 press ENTER.
•
The calculator will then ask you to guess where the intersection point is located. Use your right and left arrow
keys to move to the intersection point and press ENTER.
•
The intersection point will appear at the bottom of the screen.
Example 1:
Find the point of intersection of the lines
y
=
x
+
1 and
y
=

2
x
+
4
a)
Find the point of intersection algebraically.
b)
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 Fall '08
 JillZarestky
 Slope, Supply And Demand, Intersection, Kendra Kilmer

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