Explain how to determine whether to move right or left on a number line when adding rational numbers

If you are adding a negative number you move to the left because that's where negative numbers are, and if its positive you move to the right for example:                                                                                                                                                          -4 + 7                                                                                                                          You moves 7 spots to the right since 7 is positive and the result is 3                                                                                                                              
4 + -5
You move to the left because 5 is negative and the result is -1

and are correct.

Further explanation:

Spread can also be calculated by range, as the range is a measure of spread.

Range can be calculated as,

Range = Maximum Value - Minimum Value.

Maximum weight of leopards is .

Minimum weight of leopards is .

Range =

Range =

Maximum weight of tigers is .

Minimum weight of tigers is .

Range =

Range =

Range of the tigers is more than the range of leopards.

Therefore, the weights of tigers are more spread out.

Median is the middle value. data points lie below the median and data points lie above the median.

The number of leopards are and the number of observations are even.

Therefore, the median weight of leopards can be calculated as,

Median weight of leopards is the mean

Median weight of leopards is the mean

Median weight of leopards is the mean

The and the

Median weight of leopards =

Median weight of leopard is .

The number of tigers are and the number of observations are odd.

Therefore, the median of leopards can be calculated as,

Median weight of tigers is

Median of leopards is

Median weight of tigers is

is

Median weight of tigers =

Median weight of tigers is greater than median weight of leopard.

Therefore, the leopards have lower median weight than the tigers.

Hence, and are correct.

Learn More:

1. Learn more about addition

2. Learn more about trinomial

Answer Details:

Grade: Middle School

Subject: Mathematics

Chapter: Statistics

Keywords:

Probability, Statistics, Median, Mode, Range, Spread, Mean, Standard deviation, Symmetric, Odd, Even, Variance, Tigers, Leopards.