Question

The line L passes through the points (0,7) and (3,19). Work out the equation of the line L.

Answer 1

Answer:

A

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 = $\frac{y_{2}-y_{1} }{x_{2}-x_{1} }$

with (x₁, y₁ ) = (0, 7 ) and (x₂, y₂ ) = (3, 19 )

m = $\frac{19-7}{3-0}$ = $\frac{12}{3}$ = 4

The line crosses the y- axis at (0, 7 ) ⇒ c = 7

y = 4x + 7 → A