What is the equation of the line that passes through (4,3) and (2, -1)? y = 4x -13
y = 6x+4
y = 2x-5
y = 1/2 x -2

What is the y intercept of f(x)=(1/2)^x?

Monthly water bills for a city have a mean of $108.43 and a standard deviation of $32.09. find the probability that a randomly selected bill will have an amount greater than $155, which the city believes might indicate that someone is wasting water. would a bill that size be considered unusual?

Acollection of coins has value of 64 cents. there are two more nickels than dimes and three times as many pennies as dimes in this collection. how many of each kind of coin are in the collection?