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).