The values of x and y vary directly and one pair of values are given. Write an equation that relates x and y. Simplify completely. x=-4,y=6 Please Help Me!!!

Find the volume of the described solid.the solid lies between planes perpendicular to the x-axis at x = 0 and x=7. the cross sectionsperpendicular to the x-axis between these planes are squares whose bases run from the parabolay=-31x to the parabola y = 30/x.a) 441b) 147c) 864d) 882

Is it greater than or less than7*3_9*2

How do you write something in scientific notation?