Please help the question is in the picture

If two points are given,then exactly one line can be drawn through those two points.which geometry term does the statement represent

Which elements in the set are integers? –8, 3⁄4, √ 18 , 0, √ 16 , 5, –2⁄7, 6 a. –8, 0, 5, 6 b. –8, 0, √ 16 , 5, 6 c. 3⁄4, √ 18 , √ 16 , 5, –2⁄7 d. –8, 0, √ 18 , 5, 6

Find the exact value of cos(arcsin( one fourth for full credit, explain your reasoning. (2 points)