4. What does an r value of -0.89 suggest about two variables? A. That an increase in the independent variable causes the dependent variable to decrease
B. That an increase in the independent variable causes the dependent variable to increase
C. As the independent variable increases, the dependent variable increases
D. As the independent variable increases, the dependent variable decreases

Its either c or b

Step-by-step explanation:

sorry if its wrong

not only in mathematics, scientific proof also are required in the other field of science. also maths proofs are of particular structure, containing steps and logics. so proving is like doing science, it is science. that's why it is important to prove. 

an inaccurate proof leads to errors, or stating results that are not accurate.  which wil mess the probelm up you dont want this