What is an equation of the line that passes through the points (-2, 1) and (-8,4)?

y = - x

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 ) = (- 2, 1) and (x₂, y₂ ) = (- 8, 4)

m = = = = - , then

y = - x + c ← is the partial equation

To find c substitute either of the 2 points into the partial equation

Using (- 8, 4 ) , then

4 = 4 + c ⇒ c = 4 - 4 = 0

y = - x ← equation of line

-14

step-by-step explanation:

2x2 – 2(x+4)

=2x2-2（5+4）

=4-2×9

=4-18

=-14

126.66 m²

step-by-step explanation:

the pertinent area formula is a = πr², where r is the radius.

here, a = π(6.35 m)² = 40.32π, or approximately 126.66 m²