Which of the following is TRUE of the correlation coefficient r ?

Multiplying all data values (x’s and y’s) by 20 will have no impact on r.
–1 ≤ r ≤ +1
If r = 0, then there is no linear relationship between x and y.
All of the answer options are correct.

isaiah walks 3 miles due north, turns and then 5 miles due east. how far is he from his starting point?

a^2 + b^2 = c^2

let c = distance from starting point.

(3)^2 + (5)^2 = c^2

9 + 25 = c^2

34 = c^2

sqrt{34} = sqrt{c^2}

sqrt{34} = c

is there any answers choices? l can try to you if there is answer choices to this question,so sorry

we are given scale of 2 units.

on graph paper the space is 2.5 cm.

length of glass = 8 units.

8 units = 2 units +2 units +2 units +2 units.

each 2 unit is = 2.5cm.

therefore,

8 units = 2 units +2 units +2 units +2 units = 2.5+2.5+2.5+2.5= 10cm.