|
Please Note: This review follows the outline of unit 9 test VERY closely. If you are able to complete this review successfully then you should be prepared for the test. If you would like to retake the review as extra practice please let me know and I will reset it for you. Unit 9: Test Review Which of the following best represents the y - intercept of the line shown above? The graph below represents a linear function. -4 3 4 -3 Shane's insulation company charges an initial fee of $25, plus $1.50 for every square foot of insulation sprayed. Shane graphed y, the amount that his insulation company charges, as a function of x, the number of square feet of insulation sprayed. What does the y - intercept of Shane's graph represent? The charge per square foot of insulation sprayed The initial fee The number of square feet of insulation sprayed The total amount owed Which function best describes the graph shown below? f(x) = 2x + 6 f(x) = ½x - 6 f(x) = -2x + 6 f(x) = -½x + 6 If y is directly proportional to x and y = 24 when x = 4, the proportion equation is x = 3y y = 3x x = 6y y = 6x The slope becomes less steep and the y - intercept shifts up 8 units. The slope becomes less steep and the y-intercept shifts up 6 units.
Which best describes the effect on the graph of changing y = ⅓x - 6 to y = 3x + 2? The slope becomes steeper and the y-intercept shifts down 6 units. The slope becomes steeper and the y-intercept shifts up 8 units. What is the slope from the following table of values? -5 5 -1/5 1/5 What is the y-intercept from the following graph? 2 ⅔ 3 -⅔ f (x) = x is the for all linear functions . I and III only Given f(x) = 4x + 12 which of the following is true of f(x)?
I. The Slope is ¼ II. The y-intercept is 12. III. The x-intercept is -3. II and III only I and II only III only Given y = ½x + 6 the zero of f(x) is -6 12 6 -12 Given the graph of f(x) as shown for f(x) = -x + b, b is 3 2 4 5 What is the x - intercept of the graph of the equation y = -¼x - 4 -10 16 10 -16 What is the y-intercept of the equation 4x - y = 16? 4 -4 -16 16 (0,-3) A linear function is graphed below. (-3, 0) (0, -9) Which ordered pair best represents the y-intercept of this function? (-9,0) nothing can be determined with the given information as h increases, p decreases p is always constant as h increases, p increases If the amount of your pay check, p, is directly proportional to the number of hours you work, h, Then
If 3x - 12y = 0 is writen as a directly proportional function, where y is a function of x, then k is ¼ -¼ ¾ 3 If the constant of proportionality for a given directly proportional relationship is 8, graphically the 8 is the x -intercept the slope the zero the y-intercept If a model of the number of chickens in a pen is b = 3x + 5, where 5 is the initial number of chickens in the pen, what will happen to the number of chickens each year, represented by b, if the initial number of chickens is 1 rather than 5? The number of chickens will triple each year the number of chickens will decrease by 4 the number of chickens will decrease by one-fifth the number of chickens will increase by 1 Is the graph above a function? Hint: Use the vertical line test. |