Answer:

Step-by-step explanation:
Hi there!
Slope-intercept form:
where
is the slope and
is the y-intercept (the value of y when x is 0)
<u>1) Determine the slope (</u><u><em>m</em></u><u>)</u>
where two given points are
and 
Plug in the given points (15,2.2) and (5,1.6):

Therefore, the slope of the line is
. Plug this into
:

<u>2) Determine the y-intercept (</u><u><em>b</em></u><u>)</u>

Plug in a given point and solve for b:

Therefore, the y-intercept is
. Plug this back into
:

I hope this helps!
9+-3 means 9 plus 3 less
basically it is 9-3=6
Hi
6% increase is multiply by 1,06
done 40 times
so : 250* 1,06^40 = 2571 ,
The square root of 343 is 18.520 or 18.52 or also 18