we know that
A relationship between two variables, x, and y, represent a proportional variation if it can be expressed in the form y=Kx
where
K is the constant of proportionality or slope of the linear equation
In this problem
x ----> is the number of months
y -----> is the total amount savings
we have the ordered pairs
(4,80) and (7,140)
so
Find the value of K
K=y/x
For (4,80)
K=80/4=20
For (7,140)
K=140/7=20
The value of K is the same for both ordered paits
that means------> is a proportional relationship
therefore
the linear equation is
y=20x
the answer is the option A, C and D
Answer: the anwer is =46.76
Step-by-step explanation:
Number of bricks = 350
Cost of 1 brick = 45 p
Cost of 350 bricks = 350 × 45 p = 15750 p
Answer:
Step-by-step explanation:
0 = -16t² + 324
16t² = 324
t² = 20.25
t = 4.5 s
