Answer:
She worked 5 hours a day
Step-by-step explanation:
20 / 4 = 5
You got no graphs btw :/
But hope I help a lil bit :]
Answer: A
Step-by-step explanation:
Let

. You have

.
Taking the derivative, you get

The linear approximation to

near

is given by

So the value of

can be estimated as

Answer:
99 + 34.99x = y
Step-by-step explanation:
initial fee of $99
multiply the monthly fee (34.99) and how many months he's a member (x)
add the initial fee and total of monthly payments to get total he will spend (y)