Question

Use the line of best fit to predict the percentage sales increase when the

discount is 35%.
100
80
60
(20, 62)
Sales Increase (%)
40 -
20
(10, 32)
10
30
40
50
Discount (%)
A. 93%
OB. 107%
C. 85%
D. 22%

Answer 1

107%

Explanation:

because if we look at the x-axis, Discount (%)

and look at 35 which is between 30 and 40

and start going up we get near 100

so

107%

or?

we use the two points and with that we find the slope first

`(y2-y1)/(x2-x1)`

plug in (20,62) and (10,32)

`(32-62)/(10-20)`

equals

`(-30)/(-10)`

simplify to 3

then we use

y - y1 = m (x - x1)

y - 62 = 3 (x - 20)

y - 62 = 3x - 60

add 60 from both sides

y - 2 = 3x

add 2 to both sides

y=3x+2

then plug in 35

y= 3(35) + 2

which is

107