Answer
Decimal is a term that describes the base-10 number system, probably the most commonly used number system. The decimal number system consists of ten single- digit numbers: 0, 1, 2, 3, 4, 5, 6, 7, 8, and 9. The number after 9 is 10. The number after 19 is 20 and so forth. Additional powers of 10 require the addition of another positional digit.
The correlation coefficient for blood pressure and amount of vegetables eaten which is a negative number (-0.7) suggests that they are in inverse relation. Eating more vegetable should lower the blood pressure. In the same manner, not eating vegetables would likely cause high blood pressure.