Homework for 5-4

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Homework for 5-4

• p. 314 1-4, 15, 18, 21, 22, 31, 34, 38, 41, 46,
  48

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5-4 Linear Equations in Standard Form

• Objective write linear equations in standard
  form

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Forms of Linear Equations

• Slope-Intercept Form y mx b
• Use when have slope y-intercept
• Point-Slope Form y - y1 m(x - x1)
• Use when have two points or one point and the
  slope
• Standard Form Ax By C
• A and B not both zero
• All linear equations can be written this way
• Not the most convenient form, but it will prove
  helpful down the road!

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Equivalent Equations

• Write two equations in standard form that are
  equivalent to x 4y 3.
• Ex -2x 8y -6
• Ex 3x 12y 9
• These lines are simply multiples of the original
  and have the same slope and y-intercept as the
  original.

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Equations from Graphs
y 2 x -3
2x y 6
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Find the Missing Coefficient!
Ax 4y 6 3x 4y 6
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Flea Market Finds

• T-shirts at a flea market cost 4.50 each and
  shorts cost 6 each. You have enough money to
  buy exactly 12 T-shirts and 9 pairs of shorts.
• Write an equation in standard form that models
  the possible combinations of T-shirts and shorts
  you can buy.
• 4.5t 6s 108

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Flea Market Finds

• T-shirts at a flea market cost 4.50 each and
  shorts cost 6 each. You have enough money to
  buy exactly 12 T-shirts and 9 pairs of shorts.
• Graph the equation.
• c. List several combinations.
• 0 shirts 18 shorts
• 8 shirts 12 shorts
• 24 shirts 0 shorts