3b. The graph shows a school's profit P for selling x lunches on one day. PART B: The school wants to change the price of lunch so that when it sells more than 30
lunches in one day, it begins to make a profit. How much would the school need
to charge for each lunch in this situation?
School Lunches
Profit (dollars)
150 P
100
(65, 45)
50
(50,0)
0
10 20 30 50 60 70
-50
-100
(20) 90)
-1500
(0, -150)
200
-250
Number of lunches sold

the required function is .

step-by-step explanation:

from the given table it is noticed that the graph passing through (-3,7), (0,4), (3,1) and (8,-4).

it is a linear function because the value of y is decrease by one as the value of x increase by 1.

the slope of the function is

the slope of the function is -1 and the y-intercept is 4.

the slope intercept form is

where, m is slope and b is y-intercept.

therefore the required function is . the graph of this function is shown below.

d. 24+-0.114

step-by-step explanation:

the question requires us to calculate the approximate 95% confidence interval for the mean number of ounces of ketchup per bottle in the sample given the following statistics;

sample mean = 24

standard deviation, σ = 0.4

sample size , n = 49

the confidence interval for a population mean is calculated using the formula;

sample mean ± z-score*(σ/sqrt(n))

the z-score associated with a 95% confidence interval, from the standard normal tables, is;

1.96

substituting these values into the formula;

24 ± 1.96*(0.4/7)

= 24 ± 0.112

from the alternatives given, choice d is closest to the above expression;

yes the data was not prsented

step-by-step explanation: