Guided Practice Write an equation for the line that is perpendicular to the given line and that passes through the given point.

y = 2x + 7; (0, 0)

A.
y=−1/2x

B.
y=1/2x

C.
y=x−1/2

Solve: 25 points find the fifth term of an increasing geometric progression if the first term is equal to 7−3 √5 and each term (starting with the second) is equal to the difference of the term following it and the term preceding it.

Which of the following expressions cannot be simplified to x – 2?

The discrete random variables x and y take integer values with joint probability distribution given by f (x,y) = a(y−x+1) 0 ≤ x ≤ y ≤ 2 or =0 otherwise, where a is a constant. 1 tabulate the distribution and show that a = 0.1.2 find the marginal distributions of x and y. 3 calculate cov(x,y).4 state, giving a reason, whether x and y are independent. 5 calculate e(y|x = 1).