posted by john .
can someone please help me fast before midnight.
a)I need the correlation between x and y
b)slope of linear regression
c)y intercept of linear regression for the points
Your first 4 points follow a nice linear relation, the last point does not fit the pattern, perhaps you made a typo.
taking any two of the first two points gives us a slope of -2
using y = mx + b gives us y = -2x + b
sub in any point, e.g. (1,8)
8 = -2(1) + b
b = 10
a) the correlation between x and y is
y = -2x + 10
b) slope = -2
c) y intercept is 10
(your last point given (5,5) should have been (5,0) making it the x-intercept)