Is y=3/4x a direct variation? if so, find the constant of variation

What is the value of x? enter your answer in the box. photo attached.

What is the area of a triangle with vertices at (-3 3) (-3,2) and (1,2)?

Jonathan can type 20 documents in 40 minutes ,and susan can type it in 30 minutes and jack can type it in 24 minutes working together ,how much time will it is take them type the same document