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MAT/221 MAT221 MAT 221 WEEK 3 QUIZ

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MAT 221 WEEK 3 QUIZ 1. Question : When plotting the point (3,1) in the Video Example “Plotting Points” the presenter instructs you to begin graphing by starting at Student Answer: the point x = 3 the point y = 1 the origin the center of the line Question 2. Question : When looking at the slope of the line, which is included the example of the video, Example 20 Slope: Using coordinates, what does the presenter recommend you think of the term y “sub “ 1 as? Student Answer: y is equal to 1 y is equal to –1 the y coordinate of the first point the y coordinate of the term (0,1) Question 3. Question : The presenter of example 77, Graphing a line using intercepts, which is located in the media section of Chapter 3, the presenter indicates when solving for the y intercept you must isolate the y value by Student Answer: dividing both sides of the equation by –4 dividing both sides of the equation by 4 adding –4 to both sides of the equation adding 4 to both sides of the equation Question 4. Question : The presenter of the slideshow, “Graphing a line given a point and slope”which is located in the media section of Chapter 3, states, “The slope tells us how the line will _______” Student Answer: change cancel decrease increase Question 5. Question : To write the equation in the form y = mx + b in the video Example 27, Write an equation in slope-intercept form than find slope and y intercept, which is located in the media section of Chapter 3, the presenter eliminates the –5 by Student Answer: adding five to both sides multiplying both sides by –5 dividing both sides by –5 subtracting 5 from both sides

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