Pease 1) where is the y intercept of any direct variation equation? 2) circle the equation that is a direct variation equation. 1) y=7-3x 2)3x-7y=1 3) 3x-7y=0 4) 3y=7x-1 3) what is the direct variation equation if y=8 and x = 4? 4) what is the direct variation equation if y =-5 and x = 7 /

1. where is the y intercept of any direct variation equation?

A direct variation equation is one in which the general form is:

y = k x

where k is the constant of proportionality

The y-intercept in this case is therefore zero so it is located on the origin (0, 0)

2. The equation which is a direct variation is:

                3) 3x-7y=0

                Because we can write this as:

                y = (3/7) x

3. what is the direct variation equation if y=8 and x = 4?

We solve for the value of k since we know that:

k = y/x

k = 8/4 = 2

So the equation is:

y = 2x

4. what is the direct variation equation if y =-5 and x = 7?
We also solve for the value of k since we know that:

k = y/x

k = -5/7

So the equation is:

y = (-5/7) x

not only in mathematics, scientific proof also are required in the other field of science. also maths proofs are of particular structure, containing steps and logics. so proving is like doing science, it is science. that's why it is important to prove. 

an inaccurate proof leads to errors, or stating results that are not accurate.  which wil mess the probelm up you dont want this