Part 1
Let
x -----> the packages
y -----> the number of sheet of paper
we have the ordered pairs
(1,50) (2,100) (3,150) (4,200)
Find the slope
To find the slope we need two points
I take (1,50) (2,100)
substitute in the formula of slope
m=(y2-y1)/(x2-x1)
m=100-50)/(2-1)
m=50/1
m=50
The slope means ------> 50 sheet of paper per one package (unit rate)
Using a graphing tool
graph the line
see the attached figure
Part 2
Let
x ------> number of tickets
y ------> the cost
we have the ordered pairs
(5,40) (10,80) (20,160) (25,200)
Find the slope
To find the slope we need two points
I take (5,40) (10,80)
m=(80-40)/(10-5)
m=40/5
m=8
The slope means -------> the cost of one ticket is $8
Using a graphing tool
graph the line
see the attached figure