If x

yz, and when y=-2, z=-3, x=30. when y=4, x=80. find z

Step-by-step explanation:

Given:

replacing the proportionality sign with a constant , we have :

substituting : , and into the equation , we have :

divide through by 6

substituting   into the equation , the equation becomes

To find the value of z , when y = 4 , x = 80 , we will substitute the values into the formula , we have :

dividing through by 20 , we have :

the graph in the attached figure

step-by-step explanation:

we have

using a graphing tool

the graph in the attached figure

the roots are ( x-intercepts) x=-0.5,x=1,x=3

the y-intercept is the point (0,3)