Please help me with the attachment below, will give brainlest

Aline has a slope of 1/4 and passes through point (0.4,-1/2). what is the value of the y-intercept?

Given the points a(-2, 1) and b(8, 6), find the coordinates of the point c on directed line segment ab, that partitions ab in the ration 2: 3.

Astick 2 m long is placed vertically at point b. the top of the stick is in line with the top of a tree as seen from point a, which is 3 m from the stick and 30 m from the tree. how tall is the tree?