The height y of a balloon, in feet, after x seconds is shown in the table below.
Which equation represents the relationship between x and y?
x y
5 46
10 86
15 126
20 166
The correct option is A: y=8x+6
when x = 5 ,
y = 8( 5 ) + 6 = 40 + 6 = 46
when x = 10
y = 8( 10 ) + 6 = 80 + 6 = = 86
when x = 15,
y = 8 (15 ) + 6 = 120 + 6 = 126
when x = 20,
y = 8 (20 ) + 6 = 160 + 6 = 166
