Question

Joe purchased a tray of 48 petunias to plant in his garden. The graph shows points representing the number of flowers left to plant at several different times while Joe is planting

____x + y =_____
complete the equation, in standard form, that represents the relationship between the number of petunias left to plant, 

y , and the time,  x , Joe has spent planting.

Answer 1

Joe has no more to plant but has spent 4 hours planting them

Answer 2

Required equation is y - 36 = (24 - 36)/(2 - 1) (x - 1)
y - 36 = -12(x - 1)
y - 36 = -12x + 12
12x + y = 12 + 36
12x + y = 48