line has a slope of -7 and passes through the points to 2,-5

Answer 1

Use the "point-slope" form of a line:

y - y₁ = m(x - x₁)

where "m" is the slope and (x₁, y₁) is (2, -5) meaning x₁ = 2 and y₁ = -5.

Plug in the three things (m, x₁, and y₁) and simplify.