A sample of 9 observations collected in a regression study on two variables, x(independent variable) and y(dependent variable). The sample resulted in the following data. summation (x_i-xbar)2=18, summation (x_i-xbar)(y_i-ybar)=56, xbar=3, ybar=10 Calculate the y-intercept (b_0) of the estimated regression equation.

i think the answer is seven, for if i'm being useless °ω°

step-by-step explanation:

step-by-step explanation:

a28=58

step-by-step explanation:

a1=a1+(n-1)d

a28= 4+ (28-1)2

a28=4+(27)(2)

a28=4+54

a28=58

48 / 6 = x

in this case, x will equal the amount of money in each card!

x therefore will be 8.

trent had $8 in each birthday card.