Find the original price of an item that is on sale for $42 if it is discounted by 20%
1 answer:
You might be interested in
Answer:
y = x + 4
Step-by-step explanation:
Assuming you require the equation of the line.
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 ) = (8, 8) and (x₂, y₂ ) = (10, 9)
m = =
, then
y = x + c ← is the partial equation
To find c substitute either of the 2 points into the partial equation
Using (8, 8) , then
8 = 4 + c ⇒ c = 8 - 4 = 4
y = x + 4 ← equation of line