Answer:
y = -1/2x + 4
Step-by-step explanation:
m= -1/2 ; (2,3)
y - y₁ = m(x -x₁)
y - 3 = -1/2 * ( x - 2)
y-3 = -1/2*x + 1/2 * 2
y - 3 = -1/2x + 1
y = -1/2x + 1 + 3
