Answer:

Step-by-step explanation:
Given:
The two points on the line are:

Now, for a line with two points on it, the slope of the line is given as:

For the points
, slope is:

Now, for a line with slope 'm' and a point
on it is given as:

Plug in all the values and determine the equation of the line. This gives,

Therefore, the equation of the line is:

Answer:
2
Step-by-step explanation:
2^2+4(2)=12
4+8=12
So, x=2
Hope this helps.
-Amelia
Since y=2x+1 does not pass through the origin (i.e. there exists the constant term of 1 ), the variables y and x are not directly proportional - though, they do have a linear relationship.