ft Challenge Make a table and a graph of each set of ordered pairs (x, y). Then write a
function rule to represent the relationship between x and y.
- (-4, 7), (-3, 6), (-2, 5), (-1, 4), (0, 3), (1, 2), (2, 1), (3, 0), (4, -1)
- (-4,15), (-3, 8), ( - 2 , 3), ( - 1 , 0), (0, -1 ) , (1, 0), (2, 3), (3, 8), (4, 15)
^AT/ACT
St a n d a r d i z e d Test Pr ep
- You buy x p o u n d s o f c h e r r ie s f o r $ 2 .9 9 /lb. W h a t is a f u n c t i o n r u le f o r th e a m o u n t o f
change C you receive from a $50 bill?
CD C = 2.99x — 50
CD C = 50 - 2.99x
Extended
ResponseCD C = 50x - 2.99
CD C = 2.99 - 50x- W h a t is th e s o lu t io n of-5<h + 2< 11?
CD ~ 3 < h < 11 C D —7 < h < 9 CD ~7>h>9 - Which equation do you get when you solve -ax + by2 = c f o r b?
CD b =c- axr CD b = y (c + - - ax)-^ CD b =c + axy - The recom m ended dosage D, in m illig ra m s, o f a certain m edicin e depends on a
person's body mass m, in kilogram s. The function rule D = 0.1m 2 + 5m represents
th is re la tio n sh ip.
a. W h a t is th e r e c o m m e n d e d d o s a g e f o r a p e r s o n w h o s e m a s s is 6 0 kg? S h o w
your work.
b. O n e p o u n d is e q u iv a le n t t o a p p r o x im a t e ly 0 .4 5 k g. E x p la in h o w to f i n d th e
recom m ended dosage fo r a 200-lb person. W hat is this dosage?
CD h < -7 or h > 9CD b = -? + axMixed Review
Graph each function rule.- y = 9 - x
- y = Ax - 1
- y = 4 + 3x
- y = 6x
Convert the given amount to the given unit.- 8.25 lb; ounces 44. 450 cm ; m eters
- 90 s; m in u te s 47. 216 h; days
Get Read y! To p r e p a r e f o r Lesso n 4-6, do Ex e r c i se s 49-56.
Find each product. Simplify if necessary.- -4 (9 ) 50. —3(—7) 51. -7 .2 (-1 5 .5 )
53. — 4 (C) 54. -f(-f) 55. f(|)
See Lesson 4-4.- y = x + 1.5
- y = 12 - 3x
See Lesson 2-6.- 17 y d ; fe e t
- 9.5 k m ; m eters
See Lesson 1-6.- -6 (1 .5 )
56-*(f)PowerAlgebra.com | Lesson 4 -5 W r i t i ng a Fun ctio n Rule^267