Answer:
Step-by-step explanation:
Your generic line will be 
, so you'll need two condition.
Since it has to be perpendicular to 
, the product of the slopes needs to be -1, or 
, hence your "generic" becomes 
. Since it has to pass through [/tex](-5;-4), let's put the coordinates in there: 
your line becomes
$30 + $35 = $65
Assuming tax is on whole sale not each item:
$65 * 0.06 (6%) = $3.90 (6% of $65)
$65 + $3.90 = $68.90 ($65 + 6%)
OR
You could combine both of these steps and just use this working:
$65 * 1.06 (106%) = $68.90 (106% of $65)
-0.7166666666666666 that is the answer I got but can be rounded to -0.72
Your rate of change would be 3/4 lb/week.
You could model this with a linear eq:
y = 8+ 3/4x
The answer is ae=12 that what i got right on my test
