Question

Graph the direct variation y=−1.5x. Using the graph, find:

The value of x when y=−3; 4.5; 6
When y = −3, x = ?
When y = 4.5, x = ?
When y = 6, x = ?

Answer 1

y=-3

-3=-1.5x
you substitiue y value, then you divide both sides by -1.5 and you get 2 for x.
(2,-3)

y=4.5
4.5=-1.5x
you substitute y value, then again you divide both sides by -1.5 and you get 3.
(3,4.5)



y=6
6=-1.5x
same thing for this last one. then once again divide by -1.5 and you get -4.
(-4,6)