Given that the function y = (2a + 1)) x - (3-B) is a positive proportional function, the value range of a and B is obtained What is the value of a when y decreases with the increase of X? What is the value of a when the image of this function passes through the first and third quadrants?

Given that the function y = (2a + 1)) x - (3-B) is a positive proportional function, the value range of a and B is obtained What is the value of a when y decreases with the increase of X? What is the value of a when the image of this function passes through the first and third quadrants?

2a+1≠0 3-b=0
a≠-1/2 b=3
What is the value of a when y decreases with the increase of X?
2a+1-1/2