Answer:
1800
Step-by-step explanation:
Answer:

Step-by-step explanation:
we know that
A relationship between two variables, x, and y, represent a proportional variation if it can be expressed in the form
or
Let
x -----> the amount of weight
y ----- the amount a spring will stretch
we know that
For x=80 lb, y=2.1 in
<em>Find the value of k (constant of proportionality)</em>

substitute the values

The linear equation is

How far will it stretch when 40 pounds is attached?
For x=40 lb
substitute the value of x in the linear equation and solve for y

For this case, the first thing we must do is define variables:
x: students of group 1
y: students of group 2
We now write the system of equations that models the problem:

Solving the system by substitution we have:



Then, the value of y is given by:

Answer:
8 students of group 1
20 students of group 2
Answer:
Step-by-step explanation:
(8-8)/(-14+4) = 0/-10 = 0 is the slope