continuation Domain A all real number B x 2 D y 2 Range A al

continuation...

Domain A) all real number B) x 2 D) y -2 Range A) all real numbers B) x lessthanorequalto 2 C) x lessthanorequalto 2 D) y lessthanorequalto -2 E) y greaterthanorequalto -2 Interval of increase A) all real numbers B) x 2 D) y -2 Interval of decrease A) all real numbers B) x 2 D) y -2 End behavior (Choose 2) A) As x rightarrow - infinity, y rightarrow - infinity. B) As x rightarrow - infinity rightarrow + infinity. C) As x rightarrow + infinity, y rightarrow - infinity. D) As x rightarrow + infinity, y rightarrow + infinity. Use the graph to answer the questions. If there are two x-intercepts, choose both of them. Vertex A) (-7, 0) B) (-3, -2) C) (-2, -3) D) (0, -7) x-intercept (s) A) (-7, 0) B) (-2, -3) C) (0, -7) D) none y-intercept A) (-7, 0) B) (-3, -2) C) (-2.-3) D) (0, -7) Axis of Symmetry A) x = -2 B) x-2 C) y = -2 D) y = -3 Maximum or minimum value A) Max; -3 B) Max; -2 C) Min; -3 D) Min; -2 Range A) x lessthanorequalto -2 B) x greaterthanorequalto -2 C) y lessthanorequalto -3 D) y greaterthanorequalto -3 Find x- and y- Intercepts from an Equation Find the indicated intercepts. It there are two x-intercepts, choose both. Given: y = x^2 - 8x + 15 y-intercept A) (0.15) B) (3.0) C) (5, 0) D) (15, 0) E) None x-intercept(s) A) (-5.0) B) (-3, 0) C) (3, 0) D) (5, 0) E) None

Solution

7.2)

y = x^2 -8x+15
The roots of this equation are 5 and 3

44. The y-intercept :
x=0, we get y=15

So, (0,15) is the answer

45. x-intercepts are basically the root of y=0 or x^2-8x+15=0, which are 5 and 3
So, C and D are right answers