 # To solve equations using Intersect method with a graphing calculator Process 1.Enter y 1 = (left side of the equation). ENTER 2.Enter y 2 = (right side.

## Presentation on theme: "To solve equations using Intersect method with a graphing calculator Process 1.Enter y 1 = (left side of the equation). ENTER 2.Enter y 2 = (right side."— Presentation transcript:

To solve equations using Intersect method with a graphing calculator Process 1.Enter y 1 = (left side of the equation). ENTER 2.Enter y 2 = (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 y 1 = ENTER 2.Enter y 2 = 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. Example: Solve graphically

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 y 1 = (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 y 1 = 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

To find the value of a function with a graphing calculator Value Method 1.Enter y 1 = (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) = x 2 + 3x – 5 1.Enter y 1 = x 2 + 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) = x 2 + 3x – 5 1.Type -4. STO 2.Type x 2 + 3x – 5 ENTER 3.Read function value on right side of screen (-1).

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