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Transcript
## MATHEMATICS Quarter 1 - Grade 9 ### 23. What do you call the graph of quadratic functions? - A. Horizontal line - B. Parabola - C. Vertical line - D. hyperbola ### 24. What is true about the equation y +2x^2 = 2x(x + 1)? - A. The equation represents a quadratic function because the highest degr...
## MATHEMATICS Quarter 1 - Grade 9 ### 23. What do you call the graph of quadratic functions? - A. Horizontal line - B. Parabola - C. Vertical line - D. hyperbola ### 24. What is true about the equation y +2x^2 = 2x(x + 1)? - A. The equation represents a quadratic function because the highest degree of the variable is 2. - B. If you will simplify and rearrange the function, it will be in the form of y = mx +b. Therefore, it is not a quadratic function, but a linear function. - C. The highest degree of the variable is 3. Thus, it is not a quadratic function. - D. If the function is expanded it will be y = 2x^2 + 2x +1. Thus, the equation represents a quadratic function. ### 25. Which of the following is true about this given table of values? | x | 1 | 2 | 3 | 4 | 5 | |---|---|---|---|---|---| | y | 5 | 12 | 19 | 26 | 33 | - A. The y values are all positive. Hence, the table represents a quadratic function. - B. The y values are all positive. Hence, the table does not represent a quadratic function. - C. The first and second differences of the y values are equal. Hence, the table represents a quadratic function. - D. The first differences of the y values are already equal. Hence, the table does not represent a quadratic function. ### 26. Given the equation y=-2x^2+4x+7, what value of m and n will make the table complete: | x | -3 | -2 | -1 | 0 | 1 | 2 | 3 | 4 | |---|---|---|---|---|---|---|---|---| | y | m | -9 | 1 | 7 | 9 | n | 1 | -9 | - A. -23 and 7 - B. -13 and 7 - C. -23 and 1 - D. 1 and 7 ### 27. Which of the following graph describes a quadratic function y = ax^2 + bx + c with a > 0? ### 28. What is the vertex form of the quadratic function? - A. y = ax^2 + bx + c - B. y = a(x-h)2 + k - C. ax^2 + bx + c = 0 - D. y = mx + b
