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EQUATIONS FOR LINEAR RELATIONSHIPS

EQUATIONS FOR LINEAR RELATIONSHIPS. What two things do you need to write the equation of a line? . The cost of a school banquet is $95 plus $15 for each person attending. Write an equation that gives the total cost of the number of people attending. What is the cost of 70 people.

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EQUATIONS FOR LINEAR RELATIONSHIPS

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  1. EQUATIONS FOR LINEAR RELATIONSHIPS

  2. What two things do you need to write the equation of a line? The cost of a school banquet is $95 plus $15 for each person attending. Write an equation that gives the total cost of the number of people attending. What is the cost of 70 people. Write the equation of a line using the points: (1, -2) and (3,4)
  3. What do you need to find the equation of a line? y = mx + b How do you find slope using: a graph a table two points How do you find the y-intercept using: a. a graph b. a table c. two points
  4. Sudzo Wash and Wax charges customers $0.75 per minutes to wash a car. Write an equation that relates the total charge c to the amount of time t in minutes. Pat’s Power Wash charges $2.00 per car to cover the cost of cleaning supplies, plus $0.49 per minute for the use of water sprayers and vacuums. Write an equation for the total charge c for any car-wash time t. U-Wash-It charges $10 for each car. The business owners estimate that it costs them $0.60 per minute to provide soap, water, and vacuums for a car. Write an equation for the profit p U-Wash-It earns if a customer spends t minutes washing a car.
  5. Squeaky Clean Car Wash The Squeaky Clean Car Wash charges by the minute. The table shows the charges for several different times.
  6. Euclid’s Car Wash
  7. Super Clean Car Wash Super Clean Car Wash Date: 11 – 11 – 13 Start Time: 02:55 pm Stop Time: 03:05 pm Charge: $6 Super Clean Car Wash Date: 11 – 13 – 13 Start Time: 08:30 am Stop Time: 08:50 am Charge: $12
  8. Ticket out the door………. Now that you have worked through these examples, answer the following questions. Suppose you want to write an equation of the form y = mx + b to represent a linear relationship, what is your strategy if you are given: a description of the relationship in words? two or more (x,y) values or a table of (x,y) values? a graph showing points with co-ordinates?
  9. Write an equation of the line passing through the point (-7, -6) with slope m = 4 Solve: Solve: Solve: Billy plans to paint baskets. The paint costs $14.50. The baskets cost $7.25 each. Write an equation that gives the total cost of the number of baskets made. Determine the cost of four baskets. Draw the line y = ½x + 3 Find the equation of a line with points ((-4, -2) and (1, -2). What can you tell me about this line?
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