Essay for a Ch 5 Test Review

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Review for Unit 3 test Part 1. Writing Equations Write an Equation of a line in SLOPE-INTERCEPT FORM 1. Passing through points (4, -2) and (-2, 7) 2. With slope m = -3, passing though (0, ¼ ) 3. Through point (-3,1) and parallel to 4x – 2y = 1 4. Passing through (6, 2) and perpendicular to y = 3x – 4 5. Through the points (3, 2) and (-4, 2) 6. 7. Part 2. Word problems 1. At a car rental agency, the cost of driving 250 miles was $95 and the cost of driving 400 miles was $125. Write a linear equation for the cost of renting the car from this company, where C is cost and M is miles driven. 2. After reaching the peak of Mt. Rinjani, some hikers started descending at an average rate of 250 vertical meters per hour. After 8 hours, their altitude was 1,726 meters. Write an equation that models their decent. Use your equation to figure out how many hours it will take them to reach sea level. 3. A music store is offering a Frequent Buyers Club membership. The membership costs $22 per year, and then a member can buy CDs at a reduced price. If a member buys 17 CDs in one year, the cost is $111.25. Determine the cost of each CD for a single member and then write a linear equation to represent the total cost y of a one year membership, if x CDs are purchased. 4. Greg is driving a remote control car at a constant speed. He starts the timer when the car is 5 feet away. After 2 seconds the car is 30 feet away. Write a linear equation to find the distance d of the car from Greg. Estimate the distance the car has traveled after 10 seconds? 5. A mountain climber leaves his camp and hikes up the side of a mountain. His altitude increases at an average rate of 200 feet per hour. After 3 hours, his altitude is $4100 feet. Write an equation to find his altitude y after he has been hiking for x hours. 6.

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