Answer:
Step-by-step explanation:
A) For the city of Everettt, y-intercept represent the number of chrome books they started with.
y - intercept = 550
Everett started the 2016 year with 550 chrome books
B) y = 50x + 300
Explanation: They stared with 300 books at 2016. This will be the y-intercept
Rate of change = 50 books per year which will the slope
m = 50 and b = 300
y = mx + b
y = 50x + 300
Hint: y- intercept is where x-coordinate =0
Answer:
-10
Step-by-step explanation:
A slope's equation for 2 points on a coordinate plane is y² - y^1 ÷ x² - x^1
Note that the exponents aren't meaning powered, but just as a marking.
x1 is 2, x2 is 4, y1 is 150, y2 is 130
130-150 / 4-2 = -20/2, so -10
Answer:
A & B
Step-by-step explanation:
5x - 2y = 10 (1)
-2.5x + y = -5 (2)
When you multiply (2) by -2, you get (1), so there can be many solutions
To choose from the given options, plug in the values to check which ones satisfy the equation
5x - 2y = 10
A) (2,0)
5(2) - 2(0) = 10
10 = 10 (true statement)
B) (-2,-10)
5(-2) - 2(-10) = 10
-10 + 20 = 10
10 = 10 (true statement)
Answer:
18 kids
Step-by-step explanation:
because you multiply 0.2 by 90 and it equals 18
Answer: 
Step-by-step explanation:
Given : Sample size : n= 9
Degree of freedom = df =n-1 =8
Sample mean : 
sample standard deviation : 
Significance level ; 
Since population standard deviation is not given , so we use t- test.
Using t-distribution table , we have
Critical value = 
Confidence interval for the population mean :
90% confidence interval for the mean value will be :
Hence, the 90% confidence interval for the mean value=
