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To solve equations using Intersect method with a graphing calculator Process

To solve equations using Intersect method with a graphing calculator Process. Enter y 1 = (left side of the equation). ENTER Enter y 2 = (right side of the equation). ENTER 2nd TRACE CALC 5 Intersect

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To solve equations using Intersect method with a graphing calculator Process

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  1. To solve equations using Intersect method with a graphing calculatorProcess • Enter y1 = (left side of the equation). ENTER • Enter y2 = (right side of the equation). ENTER • 2ndTRACE CALC • 5 Intersect • Cursor to intersection (first curve) ENTER • Cursor to intersection (second curve) ENTER • Guess? ENTER • Read intersection: x = ___________ y = ____________ • Solution isxvalue. • Repeat process if more than one intersection.

  2. Solve equations using Intersect method with a graphing calculator Example: Solve graphically • Enter y1 =ENTER • Enter y2 =ENTER • 2ndTRACE CALC • 5 Intersect • Cursor to intersection (first curve) ENTER • Cursor to intersection (second curve) ENTER • Guess? ENTER • Read intersection: x = 4y = -1 • Solution isxvalue (x = 4). • Repeat process if more than one intersection.

  3. To solve equations using Root/Zero method with a graphing calculatorProcess • Set equation so zero is on one side of = sign (typically right side) • Enter y1= (left side of the equation). ENTER • 2ndTRACE CALC • 2 Zero • Cursor to left of x-intercept ENTER (Left Bound) • Cursor to right of x- intercept ENTER (Right Bound) • Guess? ENTER • Read Values: x = ___________ y = ____________ • Solution isxvalue. • Repeat process if more than one intercept.

  4. To solve equations using Root/Zero method with a graphing calculator Example: Solve graphically • Set equation so zero is on one side of = sign (5x + 15 = 0) • Enter y1=5x + 15ENTER • 2ndTRACE CALC • 2 Zero • Cursor to left of x-intercept ENTER (Left Bound) • Cursor to right of x- intercept ENTER (Right Bound) • Guess? ENTER • Read Values: x = -3 y = 0 • Solution isxvalue (x = -3). • Repeat process if more than one intercept.

  5. To find the value of a function with a graphing calculatorValue Method • Enter y1 = (right side of the function). ENTER • 2ndTRACE CALC • 1 (VALUE) • Type the x value ENTER • Confirm correct function in upper left corner. • Read function value (y =______) Note: x value must be within window range. To find the value of a function with a graphing calculatorSTOre Key Method • Type x value. STO • Type the function. ENTER • Read function value on right side of screen.

  6. To find the value of a function with a graphing calculator Value Method Example: Find f(-4), if f(x) = x2 + 3x – 5 • Enter y1 = x2 + 3x – 5 ENTER • 2ndTRACE CALC • 1 (VALUE) • Type -4 ENTER • Confirm correct function in upper left corner. • Read function value (y = -1) Note: x value must be within window range. To find the value of a function with a graphing calculatorSTOre Key MethodExample: Find f(-4), if f(x) = x2 + 3x – 5 • Type -4. STO • Type x2 + 3x – 5 ENTER • Read function value on right side of screen (-1).

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