y varies inversely with x. Find the inverse variation equation if x = -10 when y = 4.

a. y/x = -2/5
b. xy = -40
c. y/x = -40
d. xy = -2/5

Question

y varies inversely with x. Find the inverse variation equation if x = -10 when y = 4.
 
    a. y/x = -2/5 
    b. xy = -40 
    c. y/x = -40 
    d. xy = -2/5

anonymous · Answer

@ParthKohli

anonymous · Answer

@lgbasallote

lgbasallote · Answer

what does inverse variation mean again?

anonymous · Answer

@lgbasallote : i have no idea              @Calcmathlete : help

anonymous · Answer

Use this.
$$y = \frac{k}{x}$$ Plug in what you have for y and x first and solve for k. The problem asks for this, so when solving for k, look.
$$y = \frac{k}{x}$$$$yx = k$$Therefore, using your values and solve for k to get yx = ?

asnaseer · Answer

if y varies inversely with x, then this means:$$y=\frac{k}{x}$$ where k is some constant

asnaseer · Answer

follow the steps outlined by calcmathlete ^^^