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Published byJody Chapman Modified over 8 years ago
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y =or k = xy
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1.) If y varies inversely with x and y = 12 when x = 4, what is the equation? 2.) From the equation above (#1) what would y be if x = 10
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Graph the inverse equation y = xy -3 -2 0 1 2 3
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Always positive!!!!! Examples: 1.) -62.) 5 3.) ½ 4.) - ¼
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Do what is inside first then take the absolute value Examples: 1.) 3 – 62.) 5 – 7 + 2
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2( 4x + 3) < 5x + 10
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The “parent function” is y = x This is the before line
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If you add a number to the equation it moves your line up that many spaces Example: y = x + 4
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If you subtract a number to the equation it moves your line down that many spaces Example: y = x - 4
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If you multiply a number to the equation it make the line stand up more Example: y = 6x
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If you divide a number to the equation it makes your line lay flatter to the x axis Example: y = ½ x
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If you multiply or divide by a negative it switches the direction of the line Example: y = -2x
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1. Read the question and figure out what they are asking you to find. 2. Figure out what you already know and highlight important information. 3. Create an equation/ solve. 4. Check your answer: plug it in or ask yourself does this make sense?
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1.) 331 students went on a field trip. Six buses were filled and 7 students traveled in cars. How many students were in each bus?
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2.) Maci won 40 super bouncy balls playing horseshoes at her school's game night. Later, she gave two to each of her friends. She only has 8 remaining. How many friends does she have?
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Example: y = 4x A.) (5, 20) B.) (-5, -20) C.) (1.5, 6) Try: y = 2x + 3 A.) (4, 11)B.) (3, 9)C.) (5, 9)
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Carrie and her sister Kim were both born on October 25 th, but Kim was born two years before Carrie. Table Equation Graph CarrieKim
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1. Stat 2. Enter 3. Plug x’s in L1 and y’s in L2 4. Stat 5. Over to Calc 6. # 4 LinReg 7. Enter 8. Put in y = mx + b form
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1. (3, 25) (5, 30) (7, 37) (9, 45) (11, 50) 2. (1, 7) (2, 5) (3, 4) (4, 3) (5, 2)
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1. (0, 25) (1, 19) (2, 17) (3, 14) (4, 10) 2. (0, 2) (1, 3) (2, 5) (3, 9) (4, 12) 3. (5, 1) (6, 4) (7, 7) (8, 9) (9, 13)
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