Answer:
first one is rational, second is also rational, third is rational, fourth is rational, and fifth is irrational.
Step-by-step explanation:
Rational numbers are numbers that can be expressed as a fraction or part of a whole number. (examples: -7, 2/3, 3.75) Irrational numbers are numbers that cannot be expressed as a fraction or ratio of two integers. The reason why
is an irrational number is bc it's not a perfect square while
equals to 7 and is a perfect square.
Answer:
Part a
The regression equation is, 
Part b
The number of crimes for a city at 20 police officers was appointed is approximately 10.
Step-by-step explanation:
<u>x y xy x² y²</u>
15 17 255 225 289
17 7 119 289 49
17 13 221 289 169
12 21 252 144 441
25 5 125 625 25
11 19 209 121 361
27 7 189 729 49
22 6 132 484 36
146 95 502 2906 1419
Therefore,


The calculation of the intercept coefficient is as follows:


The regression equation is, 
b)
The calculation is as follows:

≅ 10
The number of crimes for a city at 20 police officers was appointed is approximately 10.
The number of crimes for a city at 20 police officers was appointed is approximately 10.
That is, the number of polices increases then the number of crimes will be decreases.
Answer:
Step-by-step explanation: