Question

The table shows the heights in inches of trees after they have been planted. Determine the equation which relates x and y.

Height In Pot, x | Height Without Pot, y
30 | 18
36 | 24
42 | 30
48 | 36


A. y = x - 6
B. y = x - 10
C. y = x - 12
D. y = x + 6

Answer 1

@Nnesha

Answer 2

30=18+12
hence 18=30-12
?

Answer 3

I'm....confused. Sorry........@surjithayer

Answer 4

30=18+12
x=y+12
x-12=y

Answer 5

Here...I'll tag someone that usually will help you. @texaschic101

Answer 6

Thank you! :)

Answer 7

Welcome

Answer 8

take 2 sets of points and find the slope
(30,18) and (36,24)
now plug that into the slope formula
slope(m) = (y2 - y1) / (x2 - x1)
(30,18)....x1 = 30 and y1 = 18
(36,24)...x2 = 36 and y2 = 24
now sub
slope(m) = (24 - 18) / (36 - 30)
slope(m) = 6/6 which equals 1

now we take y = mx + b
slope(m) = 1
you can use either of your points...(30,18)...x = 30 and y = 18
now we sub
y = mx + b
18 = 1(30) + b
18 = 30 + b
18 - 30 = b
-12 = b

so your equation is : y = 1x - 12 or just y = x - 12

Answer 9

Thank you!!!! :)