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
X is a variable, while parenthesis suggest multiplication. Y equals the amount of her book left.
(1/5) + 3(1/5) + x = 1
(1/5) + (3/5) + y = 1
Combine like terms
(4/5) + x =1
Subtract four-fifths
x = (1/5)
Lydia has 1/5 of her book left to read.
Well V= 5•7•5
Therefore V= 175
F(-2)=8-10*(-2)=28
g(-2)=5(-2)+4=-6
fg(-2)=168
Answer: the appl;es are diffrent colors
Step-by-step explanation: