Answer:
(1,40) equation: y=40x
(2,50) equation: y=25x
(4,70) equation: y=17.5x
(7,80) equation: y=11.43x
does not represent a proportional relationship because they all have different equations.
C = - 1/2t + 6
The equation usually looks like this
C = k*t + n
If t = 0 than
C = n (from the table we see that C is 6 if t = 0) than
N = 6 too
For t = 2 and c = 5 we have the equation
5 = 2k + 6
2k = -1
K = -1/2
To challenge you to see if you can do it
Answer:
yes it is a natural number