What is the equation of a line with a slope of -2 that passes through the point (6, 8)?

a) 2x + y = 20
b) oy-2x = 4
c) oy-2x = 20
d) 2x + y = 4

The random variable x has probability density function f (x) = k(−x²+5x−4) 1 ≤ x ≤ 4 or =0 1 show that k = 2/9 find 2 e(x), 3 the mode of x, 4 the cumulative distribution function f(x) for all x. 5 evaluate p(x ≤ 2.5). 6 deduce the value of the median and comment on the shape of the distribution.