The answer is:
y = -5/2x + 8
Work/explanation:
First, I will use the slope formula to find slope:

where:
m = slope;
(x₁, y₁) and (x₂, y₂) are points on the line.
Plug in the data:



Hence, m = -5/2.
So far, the equation is y = -5/2x + b.
Now, we'll use the first point (2,3) and plug it into the equation to solve for b.
3 = -5/2 (2) + b
3 = -5 + b
-5 + b = 3
b - 5 = 3
b = 3 + 5
b = 8
Hence, the equation is y = -5/2x + 8.