Aline has a slope of -1 and contains the points (1, 2) and (2, y). the value of y is

y = 1

calculate the slope m using the gradient formula

m = (y₂ - y₁ ) / (x₂ - x₁ )

with (x₁, y₁ ) = (1, 2 ) and (x₂, y₂ ) = (2, y )

m = = y - 2

now m = -1, hence

y - 2 = -1 ( add 2 to both sides )

y = 1

answer: 4/6 =5/7.5

step-by-step explanation: it is based on scale and the scale between the two is 1.25. the answer is correct but i dont know if i explained it right