Part A : The diagram shows a line of best fit with a positive correlation.As the amount of guests increases the amount of pizzas increase supporting the positive correlation.
Part B : I haven't gotta clue sorry
Answer:
1.8 inches
Step-by-step explanation:
Create a proportion where x is the distance on the map
= 
Cross multiply and solve for x
55x = 99
x = 1.8
So, the distance on the map is 1.8 inches

a ) The domain:
x^4 - 16 x² ≥ 0
x² ( x² - 16 ) ≥ 0
x² - 16 ≥ 0
x² ≥ 16
x ∈ ( - ∞, - 4 ] ∪ [ 4 , + ∞ )b ) f ` ( x ) =

=
( 2 x³ - 16 x ) / √(x^4 - 16 x²)c ) The slope of the tangent line at x = 5:
f ` ( 5 ) = ( 2 * 125 - 16 * 5 ) / √ ( 625 - 400 ) = 170 / 15 = 34 / 3
The slope of the line normal to the graph at x = 5:
m = - 3 / 34