Answer:
y = - 2x + 4
Step-by-step explanation:
The equation of a line in slope- intercept form is
y = mx + c ( m is the slope and c the y- intercept )
Calculate m using the slope formula
m =
with (x₁, y₁ ( = (1, 2) and (x₂, y₂ ) = (3, - 2)
m = =
= - 2, then
y = - 2x + c ← is the partial equation
To find c substitute either of the 2 points into the partial equation
Using (1, 2 ) , then
2 = - 2 + c ⇒ c = 2 + 2 = 4
y = - 2x + 4 ← equation of line
The original area of the rectangle is
<u>Explanation:</u>
width = x
length = x + 2
area of the rectangle = x (x+2)
length = x + 2 + 5 = x+7
Solving this equation, we get
x =5ft
So, original width = 5ft
original length = 5+2ft = 7ft
Thus, original area of the rectangle = 5 X 7ft =
Therefore, the original area of the rectangle is