Name all sets of numbers to which each real number belongs.
1) 12
2) -15
3)1 1/2
4) 3.18
5) square root 48
6) 9.3
7) -2 7/9
8) square root 25
9) square root 3
10) negative square root 64
11) negative square root 12
12)8/4

Answer and Explanation:

To find : Name all sets of numbers to which each real number belongs ?

Solution :

Real number is defined as a set which contain all rational, irrational, integers, whole number, natural number.

Real number not contain an imaginary number i.e. i.

Now, Determining each number

1) 12 is real, rational, whole, integer.

2) -15 is real, rational, integer.

3) is real, rational

4) 3.18 is real, rational

5) is real and irrational because non-terminating and non-repeating.

6) 9.3 is real, rational

7) is a real, rational as it is repeating decimal.

8) is a real, rational, integer.

9) is real and irrational because non-terminating and non-repeating.

10) is real, rational , integer.

11) is real, irrational because non-terminating and non-repeating.

12) is real, rational, whole, integer.

y= 2x+7

changed to y= 5x +7

as slope is increased from 2 to 5

therefore it would be less steeper

so, option d) is correct