What is the mean absolute deviation:
4,7,8,8,9,9,10,12,12,19,22,26,27,29 ,29,31,32,34,41,44,45,45,52,55,56,6 1,62,63,64,77,79,80,88,81,82,84,89, 89,90,95,104,117,118,119,128,136,13 7,167,191,329

128.309728

add all numbers together and divide by 50(there are 50 numbers)

find the difference of each number and 67.92(the mean)

add all these numbers together and divide by 50

10

step-by-step explanation:

7+3=10

step-by-step explanation:

let

we know that

the y-intercept is the y-coordinate of the point when the value of x is equal to zero

so

the y-coordinate of the point a is the y-intercept

the answer part a) is

the value of y-intercept is

part b) find the slope m

we know that

the value of the slope is equal to

substitute the values

therefore

the answer part b) is

the value of the slope is equal to

the general answer is

the slope is

the value of y-intercept is