what is 8x+7y=-50

Answer 1

It's an equation (note the = sign)

It's the equation of a straight line slope=-(8/7) and intercept = -(50/7)

Does this help you?

 

Jim

Answer 2

It is the equation of a straight line, with slope -8/7, intercepting the y-axis (y-intercept) at -50/7 (coordinates are 0, -50/7).  In other words, the equation can be written in slope-y-intercept form as y = -8/7*x-50/7