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Algebra I and Concepts Ch. 3 Test Review Directions 1) Get out a piece of paper, put your name and “Ch. 3 Test Review” at the top 2) As each slide appears, work through the problems shown. You may not finish them all, that is ok! Don’t rush, work through what you can. 3) When the answer slide is posted, check your answers, find and correct mistakes. Ask questions if necessary. 4) Finish any questions by looking up the review on my website 5) This will be turn in on MONDAY with your homework Find the missing value Find the value of r so that the line passes through the set of points and has the given slope 1) (r, -5), (3, 13), m = 8 2) (-2, 6), (r, -4), m = -5 Find the missing value Find the value of r so that the line passes through the set of points and has the given slope 1) (r, -5), (3, 13), m = 8 2) (-2, 6), (r, -4), m = -5 r = 0.75 r=0 -5 -13 =8 r -3 -18 = 8(r - 3) -18 = 8r - 24 6 - -4 = -5 -2 - r 10 = -5(-2 - r) 10 = 10 + 5r 6 = 8r 0 = 5r 0.75 = r 0=r Is the graph a function? 1) 2) 3) 4) Is the graph a function? 1) YES 2) NO 3) YES 4) NO Find the x and y intercepts of the following equations 1) -5x + 8y = -40 2) x – 3y = 15 Find the x and y intercepts of the following equations 1) -5x + 8y = -40 X-int: (8, 0) Y-int: (0, -5) 2) x – 3y = 15 x-int: (15, 0) y-int: (0, -5) Given two functions, determine any similarities and differences of their graphs. (Hint: Use cover-up to graph) 1) 3x – 4y = 12 2) -x – 3y = 9 Given two functions, determine any similarities and differences of their graphs. (Hint: Use cover-up to graph) 1) 3x – 4y = 12 2) -x – 3y = 9 • One slope is positive, one is negative • They have the same y-intercept Find the slope of the line through the 2 points, then use the slope to classify the line as, horizontal, vertical, or oblique 1) (-3, 7) (-3, 4) 2) (-4, 3), (-2, 1) 3) (5, 2), (-6, 2) Find the slope of the line through the 2 points, then use the slope to classify the line as, horizontal, vertical, or oblique 1) (-3, 7) (-3, 4) Slope: undefined Vertical Line 2) (-4, 3), (-2, 1) Slope: -1 Oblique 3) (5, 2), (-6, 2) Slope: 0 Horizontal Line Word Problems! 1) In 2000, the cost of in-state tuition at Mizzou was $9,000 a year. In 2013 the cost of in-state tuition is $21,000. Find the rate of change. 2) Mrs. Huseman drives 45 miles to work and it takes her 40 minutes. If she maintains that same speed, how long will it take her to drive 105 miles? Word Problems! 1) In 2000, the cost of in-state tuition at Mizzou was $9,000 a year. In 2013 the cost of in-state tuition is $21,000. Find the rate of change. Increasing $923.07 per year 2) Mrs. Huseman drives 45 miles to work and it takes her 40 minutes. If she maintains that same speed, how long will it take her to drive 105 miles? 93.3 min or 1.55 hours Complete the problems: The following table represents a linear function. Fill it in and identify the x and y intercepts X Y -2 12 -1 8 0 1 2 Graph the line if the x intercept is 5, and the y-intercept is -3 Complete the problems: The following table represents a linear function. Fill it in and identify the x and y intercepts X Y -2 12 -1 8 0 4 1 0 2 -4 X-int: (1,0) Y-int: (0, 4) Graph the line if the x intercept is 5, and the y-intercept is -3 Graph the following equations 1) y = -2 2) y = -x + 4 3) 2x – y = 8 4) x = 5 Graph the following equations 1) y = -2 2) y = -x + 4 3) 2x – y = 8 4) x = 5 Evaluate the function for f(1), f(-3), and f(5), then graph the points f(x) = -2x + 3 Evaluate the function for f(1), f(-3), and f(5), then graph the points f(x) = -2x + 3 -2(1) + 3 = 1 f(1) = 1 -2(-3) + 3 = 9 f(-3) = 9 -2(5) + 3 = -7 f(5) = -7