(1, 2) and (3, -2).

writing equations in slope intercept form

y = - 2x + 4

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 ( = (1, 2) and (x₂, y₂ ) = (3, - 2)

m = = = - 2, then

y = - 2x + c ← is the partial equation

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

Using (1, 2 ) , then

2 = - 2 + c ⇒ c = 2 + 2 = 4

y = - 2x + 4 ← equation of line

the least common denominatore of 7 and 2 is 9

step-by-step explanation:

7+2=9

215.92 dollars is the answer