WILL MARK THE BRAINLESST PLS ANSWER ALL THESE QUESTIONS Identify the slope of the linear equations 7x+y=0

Identified the Y-intercept of the linear equation 2X-2Y=8.

Write equation of the line in the slope intercept form with the given information
M=3
B=8

Write equation of the line in slope intercept form with the given information
Slope=-4
Passes through(0,0)

Write the equation of the line in the slope intercept form with the given information
(2,3),(0,9)

A recording studio charges musicians in the initial fee of $50 to record an album studio time cost for an additional $75 per hour write the linear function that represents the total cost of recording an album as a function of a studio time in hours

What is the slope of the graph y=12x-19