Which of the following r-values represents the strongest correlation? a. 0.55 b. 0.45 c. 0.65 d. 0.75

There are two kinds of correlation

1. Positive Correlation

2. Negative Correlation

As all the values of r(Correlation Coefficient)given in the table{A. 0.55      B.0.45    C.0.65     D.0.75} are positive, so higher the value of r Strongest the correlation.

The Highest value of r is 0.75 .

The two values of r which describes strongest correlation is (+1) and (-1) and the linear relationship which describes weakest correlation having value r,  has value 0.

Option (D) 0.75 is true option.

- 2 + 10x³ - 21x² + 19x - 4

step-by-step explanation:

each term in the second factor is multiplied by each term in the first factor

x²(- 2x² + 4x - 1) - 3x(- 2x² + 4x - 1) + 4(- 2x² + 4x - 1) ← distribute

= - 2 + 4x³ - x² + 6x³ - 12x² + 3x -8x² + 16x - 4

collect like terms

= - 2 + 10x³ - 21x² + 19x - 4 ← in standard form

17

step-by-step explanation: