Answer:
Step-by-step explanation:
y=-1 is a horizontal line going through y=-1. x=-1 is a vertical line going through x=-1.
y=-1 has a slope of zero. the y-intercept is -1.
x=-1 has no slope. the slope is undefined. there is no y-intercept.
44
Step-by-step explanation:
The line is pointing to 44 and the small lines are counting by two
Assuming ya mean

take derivitive
remember dy/dx e^x=e^x
also the chain rule
so

find where it equals 0


multiply both sides by e^x

divide both sides by 8

take ln of both sides


divide both sides by 9

x≈-1/5
f'(-1)<0
f'(0)>0
so it is increasing from x to infinity
the interval it is increasing on is
Answer:
Percent increase is 21%
Step-by-step explanation:
Initial cost of shoes = $72
New price of shoes = $87
Increase in price of shoes = New price of shoes - Initial cost of shoes
= 
= $15
Percentage increase in price of shoes = ( Increase in price of shoes ÷ Initial cost of shoes) × 100
=
≈ 21%
So, percent increase is 21%