Precalculus 1
unit 1 day 4 - analyzing graphs of functions and relations

4. the number of households h in millions with only
wireless phone service from 2001 to 2005 can be
modeled by h(x) = 0.5x^2+ 0.5x + 1.2, where x
represents the number of years after 2001.
wireless only households
sg
years since 2008
a. state the relevant domain
b. approximate the range.
c. use the graph to estimate the number of
households with only wireless phone service in
2003
d. then find it algebraically.
6. re
h(x) =
a.
e
find the y-intercept algebraically,
what does this represent?
6. does the function have any zeros?
h. if yes, find them
no explain why
pactor
find the y-intercept and zero(ssigebraically

Started: jun 20 at 10: 35pm quiz instructions question 3 y 2x+4 graph the system of linear inequalities 1 by < 2x-2 ty

Which polynomial equation of least degree has -2, -2, 3, and 3 as four of its roots? (x + 2)(x - 3) = 0 (x - 2)-2(x + 3)3 = 0 (x-2 + 2)(x2- 3) = 0 (x + 2)2(x - 3)2 = 0

The probability that a u.s. resident has traveled to canada is 0.18 and to mexico is 0.09. a. if traveling to canada and traveling to mexico are independent events, what is the probability that a randomly-selected person has traveled to both? (page 109 in the book may ) b. it turns out that only 4% of u.s. residents have traveled to both countries. comparing this with your answer to part a, are the events independent? explain why or why not. (page 119 may ) c. using the %’s given, make a venn diagram to display this information. (don’t use your answer to part a.) d. using the conditional probability formula (page 114 in the book) and the %’s given, find the probability that a randomly-selected person has traveled to canada, if we know they have traveled to mexico.