Is there a picture to the question
Hello there!
We are given two points.
We use the following formula:



So the slope is -3. Hope it helps!
~Just a cheerful teen
#CarryOnLearning

60 plain pizzas last week
42 fewer pizzas this week
Number of pizzas sold this week = 60 - 42 = 18
60 ------------------------- 100
18 ------------------------ x
x = (18 x 100)/60
x = 1800/60
x = 30%
The percent change will be 100 - 30 = 70%
The square root is about 5.66 (that is rounded)