I think that there are 4 termms if we condider onlu plus and minus as operators.
Answer:
In the graph attached there is a sample generated with a correlation coefficient r=-0.5.
Step-by-step explanation:
A value of r that is -0.5 shows that there is a certain correlation and that this correlation is negative.
As there are no examples in this question, I searched for a generator of random samples with a user-input correlation coefficient between the two variables.
In the graph attached there is a sample generated with a correlation coefficient r=-0.5.
2000(3/5)
6000/5
1200
So 1200 doctors used brand X
Answer:
7(3 + 7)
Why:
7x3=21
7x7=49