College Algebra 9th txtbk

SA-30
Student Answer Appendix
2
25. 29.
x 4 1
x 3 3
(x 3) 2
x 2 2
x 2 1
2x 1 x 1
2x 2 x 1
Exercises B-3
3. y 2x 2; straight line 5. y 2x 2, x 0; a ray (part of a straight line) 7. y 2 3 x; straight line
y
y
y
5
5
5
5 5
x
5 5
x
5 5
x
5
5
5
9. y 2 4x; parabola 11. y 2 4x, y 0; parabola (upper half)
y
y
5
5
5 5
x
5 5
x
5
5
21. y At2 Dt F
x t,
, 6 t 6 ; parabola 23.
E
29. (A) The graphs are symmetric about the line y x.
(B) 1. y e x
2. x e x or y ln x
Function 2 is the inverse of function 1.
y 2 x 2 8, x 1, y 3; part of a hyperbola