Answer:
Direct Variation
Step-by-step explanation:
Given: A car travels at a distance of 
km. The formula that relates to 
is 
To find: kind of variation
Solution:
The formula that relates to is
Here, 
is a constant of proportionality.
Constant of proportionality is also called as constant of variation.
varies directly as .
Therefore, this is a direct variation.
Answer:
y=-1/3x-1
Step-by-step explanation:
Perpendicular lines have slope that are opposite sign and reciprocals
3x-y=12 has a slope of 3, therefore perpendicular line must have slope of -1/3
2=-9(-1/3)+b
2=3+b
b=-1
Answer:
n = - 4
Step-by-step explanation:
note that 625 = 
, then
= 
= 
Since the bases on both sides are equal, both 5 then equate the exponents
n = - 4
Multiply 80 by 5/8ths.
80*5/8=50
