A P E X To find the equation of a regression line, û = ax + b, you need these formulas:
a
b=y-ax
A regression line has a slope of 4.404. If the mean of the x-coordinates of the
data points is 8.891, and the mean of the y-coordinates is 5.519, what is the
y value of the y-intercept of the line to three decimal places?
A. -33.637
B. 33.637
C. 15.415
D. -15.415

it is probably the graph on the bottom right.

arithmetic sequence

step-by-step explanation:

given that a sequence has terms as

19, 15, 11,

this is represented on a graph

the pattern indicates that the sequence is an arithmetic sequence with i term

a=19 and common difference d =-4

any general term

thus the sequence is reduced by 4 for each successive term starting from 1 and nth term is

24-5n.

first negative term would start after 5th term

5th term =24-25< 0

from 5th term onwards the sequence would be negative.

15

step-by-step explanation:

we are given the following expression and we are to solve it and find the product:

-13 × (-5)

solving the given expression in the standard order of solving a mathematical expression, beginning with the opening of brackets and then multiplying the terms and changing their signs.

-3 × -5 = 15 (answer is positive because when negative is multiplied with negative, it gives a positive answer)

757764

step-by-step explanation:

de77737dd