A proportional relationship is also a direct variation.
The general equation of direct cvariation is
y = kx,
where k is a number.
In your case, if k = -1, then y = kx becomes y = (-1)x which is the same as
y = -x
The conclusion is valid
it is a systematic random sample
and the second one is a line graph (I think)
Step-by-step explanation:
7/8 - 1/4 = 5/8
__z_________z_
70 or +70
To represent a positive integer
