Answer:
y = 4x - 7
Explanation:
The equation of a line in slope- intercept form is
y = mx + c ( m is the slope and c the t- intercept )
Calculate m using the slope formula
m =

with (x₁, y₁ ) = (2, 1) and (x₂, y₂ ) = (0, - 7)
m =
=
= 4
The line crosses the y- axis at (0, - 7) ⇒ c = - 7
y = 4x - 7 ← equation of line