Answer:
d
Step-by-step explanation:
Answer:
The correlation between sales and advertising is positive.
Step-by-step explanation:
For every $35 spent on advertising, sales increase by $1
Is FALSE, since y = 500 + 35 x $35, sales increase more than $1
Even if no money is spent on advertising, the company realizes $35 of sales
Is FALSE, if no money is spent, the sales amount to $ 500 (when X = 0)
The coefficient of correlation between sales and advertising is 0.81
Is FALSE, since R² = 0.9. The coefficient of correlation = R = 0.94, not 0.81
Rational numbers are numbers that can be written as a ratio. That means that it can be written as a fraction. All whole numbers are rational.
Irrational numbers can be written as a decimal but not as a fraction.
The answer to the problem would be: 217.62mm