To solve equations using Intersect method with a graphing calculator Process 1.Enter y 1 = (left...
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Transcript of To solve equations using Intersect method with a graphing calculator Process 1.Enter y 1 = (left...
To solve equations using Intersect method with a graphing calculatorProcess
1. Enter y1 = (left side of the equation). ENTER
2. Enter y2 = (right side of the equation). ENTER
3. 2nd TRACE CALC
4. 5 Intersect
5. Cursor to intersection (first curve) ENTER
6. Cursor to intersection (second curve) ENTER
7. Guess? ENTER
8. Read intersection: x = ___________ y = ____________
9. Solution is x value.
10. Repeat process if more than one intersection.
Solve equations using Intersect method with a graphing calculator
1. Enter y1 = ENTER
2. Enter y2 = ENTER
3. 2nd TRACE CALC
4. 5 Intersect
5. Cursor to intersection (first curve) ENTER
6. Cursor to intersection (second curve) ENTER
7. Guess? ENTER
8. Read intersection: x = 4 y = -1
9. Solution is x value (x = 4).
10. Repeat process if more than one intersection.
3-2
13 xx Example: Solve graphically
x3
3-2
1x
To solve equations using Root/Zero method with a graphing calculator Process
1. Set equation so zero is on one side of = sign (typically right side)
2. Enter y1= (left side of the equation). ENTER
3. 2nd TRACE CALC
4. 2 Zero
5. Cursor to left of x-intercept ENTER (Left Bound)
6. Cursor to right of x- intercept ENTER (Right Bound)
7. Guess? ENTER
8. Read Values: x = ___________ y = ____________
9. Solution is x value.
10. Repeat process if more than one intercept.
To solve equations using Root/Zero method with a graphing calculator
1. Set equation so zero is on one side of = sign (5x + 15 = 0)
2. Enter y1= 5x + 15 ENTER
3. 2nd TRACE CALC
4. 2 Zero
5. Cursor to left of x-intercept ENTER (Left Bound)
6. Cursor to right of x- intercept ENTER (Right Bound)
7. Guess? ENTER
8. Read Values: x = -3 y = 0
9. Solution is x value (x = -3).
10. Repeat process if more than one intercept.
Example: Solve graphically )3(297 xx
To find the value of a function with a graphing calculator Value Method
1. Enter y1 = (right side of the function). ENTER
2. 2nd TRACE CALC
3. 1 (VALUE)
4. Type the x value ENTER
5. Confirm correct function in upper left corner.
6. Read function value (y =______)
Note: x value must be within window range.
To find the value of a function with a graphing calculator STOre Key Method
1. Type x value. STO
2. Type the function. ENTER
3. Read function value on right side of screen.
To find the value of a function with a graphing calculator Value Method
Example: Find f(-4), if f(x) = x2 + 3x – 5
1. Enter y1 = x2 + 3x – 5 ENTER
2. 2nd TRACE CALC
3. 1 (VALUE)
4. Type -4 ENTER
5. Confirm correct function in upper left corner.
6. Read function value (y = -1)
Note: x value must be within window range.
To find the value of a function with a graphing calculator STOre Key Method
Example: Find f(-4), if f(x) = x2 + 3x – 5
1. Type -4. STO
2. Type x2 + 3x – 5 ENTER
3. Read function value on right side of screen (-1).