Answer:
-10
Step-by-step explanation:
A slope's equation for 2 points on a coordinate plane is y² - y^1 ÷ x² - x^1
Note that the exponents aren't meaning powered, but just as a marking.
x1 is 2, x2 is 4, y1 is 150, y2 is 130
130-150 / 4-2 = -20/2, so -10
