Calculator Skills 2
INPUT EACH EQUATION INTO YOUR CALCULATOR
AND PRESS GRAPH
THEN FIND THE ORDERED PAIR SOLUTION
HOLD UP YOUR CACLULATOR WHEN YOU HAVE
THE SOLUTION
y = 3x  6
y = 2x + 4
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INPUT INTO y1 AND y2
GRAPH
2ND
TRACE (CALC)
5 (INTERCEPT)
ENTER, ENTER, ENTER
(2,0)
• y1 = 3x  6
y2 = 2x + 4
4x – 2y = 8
y = 7x + 5
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INPUT INTO y1 AND y2
GRAPH
2ND
TRACE (CALC)
5 (INTERCEPT)
ENTER, ENTER, ENTER
(1, –2)
• y1 = (8 – 4x)/ – 2
y2 = 7x + 5
3x + 6y = 12
y  3 = 2(x 2)
(1.2 , 1.4)
• y1 = (12–3x)/6
• y2 = 2(x 2) + 3
y + 1 = 4(x  2)
y = 6x 10
(.5 , –7)
• y1 = 4(x  2) – 1
• y2 = 6x 10
5x – y = 2
–x+y= 2
(1 , 3)
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y1 = (2– 5x)/ – 1
y2 = (2 + x)/1
2x + 2y = 6
– 2x + 3y = –1
(2, 1)
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y1 = (6 – 2x)/ 2
y2 = (–1 + 2x)/ 3
– 2y – 2x = – 8
2y – 3x = – 2
LOOK AT WHERE THE “X” AND “Y” ARE
LOCATED IN PROBLEM
(2, 2)
• y1 =( – 8 +2x )/–2
y2 =( – 2 + 3x)/ 2
4y = 3x – 2
3x + 2y = – 10
(–2, –2)
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y1 = (– 2+3x)/4
y2 = (– 10 –3x)/2
4x + (–2y) + x = 2
6x + 2y = – 4
(-.181818, –1.454545)
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y1= (2 – 4x –x)/ –2
y2 = (– 4 – 6x)/2
2x + 2y ≤ 6
y≥x+1
• FOR INEQALITIES INPUT EQ. INTO y1 AND y2
• USE LEFT SCROLL ARROW  TO MOVER
CURSER TO EXTREME LEFT
• PRESS ENTER UNTIL YOU GET THE UP
RIGHT TRIANGLE  ( GREATER THAN)
• OR PRESS ENTER UNTIL YOU GET THE
DOWN RIGHT TRIANGLE (LESS THAN)
• PRESS GRAPH
• LOOK FOR DOUBLE SHADED REGION
• FIND POINT OF INTERSECTION
Left double shaded
with (1,2) intercept
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y ≤ (6 – 2x)/2
y≥x+1
x≥ –y+2
y – 3x < 2
• REMEMBER TO REVERSE (OR FLIP )
THE INEQUALITY WHEN DIVIDING OR
MULTIPLYING BY A NEGATIVE “–”
NUMBER
SHADED LEF: (0,2)
• y1 ≤ (x – 2)/ –1
• y2 < (3x+ 2)
3x + 2y > 6
y < 2(x – 2)
SHADED RIGHT: (2,0)
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y1 > (6 – 3x)/2
y2 < 2(x – 2)
y – 3 ≤ 2(x – 1)
x > – 2(y – 1)
Upper Right double shaded:
(0,1)
• y1 ≤ 2(x – 1) + 3
• y2 > (x – 2)/–2
2y ≥ – 2x + 4
– y – 3 > 2(x – 4)
TOP LEFT DOUBLE SHADED:
(3, – 1)
• y1 ≥ (– 2x + 4)/2
• y2 < (2(x – 4) + 3)/ –1
– 3x + 2y ≤ 3
y>–3
REMEMBER: SINCE NO “x” IN SECOND
INEQALITY, JUST PLACE –3 INTO y2
TOP RIGHT DOUBLE SHADED:
(–3, –3)
• y1 ≤ (3 +3x)/2
• y2 > – 3
• END