Answer:
X is the GPA
Y is the Salary
Standard deviation of X is 0.4
Standard deviation of Y is 8500
E(X)=2.9
E(Y)=47200
We are given that The correlation between the two variables was r = 0.72
a)


So, slope = 15300
Intercept = 2830
So, equation : 
b) Your brother just graduated from that college with a GPA of 3.30. He tells you that based on this model the residual for his pay is -$1880. What salary is he earning?

Observed salary = Residual + predicted = -1860+53320 = 51440
c)) What proportion of the variation in salaries is explained by variation in GPA?
The proportion of the variation in salaries is explained by variation in GPA = 
Answer:
b=1/2-9/4c
Step-by-step explanation:
first get B on one side
8b+18c=4
-18c -18c
8b=4-18c
divide both sides by 8
8b=4-18c
/8 /8 /8
b=1/2-9/4c
Total number of cans that need to be collected = 325
Number of cans collected in first week = 135
Number of cans collected in the second week = 89
The number of cans collected in third week = c
Then the inequality equation will be
135 + 89 + c = 325
224 + c = 325
c = 325 - 224
= 101
So at least 101 cans are required to meet the goal and more that 101 cans will surpass the goal.
Answer:
30
Step-by-step explanation: