A random sample of 25 students had a grade point average with a mean of 2.86. Past studies have shown that the population standard deviation is 0.15 and the
population is normally distributed. Construct a 90% confidence interval for the
population mean grade point average.
0 (2.80 2.91)
0 (2.81, 2.91)
(2.78, 2.94)
(2.77, 2.95)

is should be y = 5x

step-by-step explanation:

correct me if im wrong

i think it would be c

mark brainliest if im right

step-by-step explanation:

system of linear equation

step-by-step explanation:

as given in the data

a= 20 , b= -12

let us suppose that it is a straight line equation

now we know the formula for the system of linear equation

b= ma + c )

here m is slope of a straight line which is equal to formula

m=   (ii)

and here c is a constant

now putting the value of a and b in equation (ii)

m=

m=

putting the value of a,b and m in equation (i) gives us

-12 = + c

-12=-12 + c

adding 12 to both sides

-12 +12 = -12 +12 +c

0 =c

or c=0

as the value of the constant is zero which gives us that it is a linear equation and this order pair satisfies the system of linear equations.

im not sure of the names, but the answer is 48