Given four functions , which one will have the smallest y-interception

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

The first floor of marcus’ house is 1,440 square feet. he will cover 1,033 square feet with wood and the rest with tile. a box of tiles will cover 11 square feet. how many boxes of tile does marcus need to buy to cover the floor?

Write an equation for the function that includes the points (2,100)and (3,100)