The answers are provided, but how do you know the answers to these. Please advise- further explain to better understand. For question 16-18

16. If the correlation of two variables is -.80, how strong is their relationship? [Chapter 6, Section 2) (a) Weak (b) Moderate (c) Strong (d) Very strong (e) Something's wrong 17. If the correlation of two variables is .10, how strong is their relationship? (Chapter 6, Section 2) (a) Weak (b) Moderate (c) Strong (d) Very strong (e) Something's wrong 18. If the correlation of two variables is 2l30, how strong is their relationship? [Chapter6, Section 2) (a) Weak (b) Moderate (c) Strong (d) Very strong (e) Something's wrong