To find the average sales rate of cupcakes per customer, you divide the total number of cupcakes sold (168) by the total number of customers (50). The result is approximately 3.36 cupcakes per customer.
To answer this question, you need to understand the concept of a rate, which is a ratio that compares two different kinds of units. Here, the units are the number of cupcakes sold and the number of customers.
Firstly, note that a 'dozen' equals 12. So the shop sells 14 dozen, or 168 cupcakes every day.
To compute the rate, you divide the total number of cupcakes by the number of customers: 168 cupcakes ÷ 50 customers = 3.36 cupcakes per customer. So, on average, each customer at the shop buys approximately 3.36 cupcakes.
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Answer:
y = -1.2x² +6.6x +2
Step-by-step explanation:
The quadratic regression function of a calculator or spreadsheet can do this for you. The resulting function is ...
y = -1.2x² +6.6x +2
_____
If you want to do this by hand, put the given (x, y) values into the formula ...
ax² +bx +c = y
and solve the resulting system of equations.
The third point tells you c=2, so you can simplify the system of equations to ...
a(-2)² +b(-2) +2 = -16 ⇒ 4a -2b = -18 ⇒ 2a -b = -9
a(3)² +b(3) +2 = 11 ⇒ 9a +3b = 9 ⇒ 3a +b = 3
Adding these equations together gives ...
(2a -b) +(3a +b) = (-9) +(3)
5a = -6 . . . . . . . . simplify
a = -1.2 . . . . . . . divide by 5
b = 3 -3a = 3 -3(-1.2) = 6.6 . . . . from the second equation
Now we know the coefficients are a=-1.2, b=6.6, c=2, so the function is ...
y = -1.2x² +6.6x +2
hey guys, dont vote badly on the other persons answer. theyre right, you just gotta read it closely.
x = first
2x = second
3x = third
the answer is x, 2x, 3x :)