Question

Which equations show direct variation between a and b?
choose ALL answers that are correct.
a. b=0.7a
b. b=1/8a-3
c. 5(1/a)=b
d. 1a=b

Answer 1

Do you know what direct variation is?

Answer 2

no ):

Answer 3

It's alright, dont worry.

Answer 4

"When two variables are related in such a way that the ratio of their values always remains the same, the two variables are said to be in direct variation."
http://www.freemathhelp.com/direct-variation.html

Answer 5

but what would the answer be?

Answer 6

not that direct variation increases with direct proportionality as the independent variable e.g
y=4x