Question

What is the equation of line l?

Answer 1

Answer:

y = 3x - 3

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 = (y₂ - y₁ ) / (x₂ - x₁ )

with (x₁, y₁ ) = (0, - 3) and (x₂, y₂ ) = (1, 0) ← 2 points on the line

m = $\frac{0+3}{1-0}$ = 3

The line crosses the y- axis at (0, - 3) ⇒ c = - 3

y = 3x - 3 ← equation of line

 

Answer 2

Answer:

Step-by-step explanation:

y = 3x-3

because this line passing through the points A(1;0)  , B(0;-3)

put x = 1    : y= 3(1)-3 =0

     x = 0   : y = 3(0)-3 = -3