Please help me (explain the why the answer is correct please)

b

Step-by-step explanation:

b is undefined bc remember that slope is rise/run

if the "run" is 0, then that makes it rise/0  and dividing by 0 is undefined

a has a positive slope bc it goes up from left to right

c has a negative slope bc it goes down left to right

d has a slope of zero -- and it makes sense bc the rise=0 and dividing zero by a nonzero number will equal zero

the answer is 844

step-by-step explanation:

it is 844 because if you add 836.50 + 7.5 you will get 844

solve systems of equations by graphing. a system of linear equations contains two or more equations e.g. y=0.5x+2 and y=x-2. the solution of such a system is the ordered pair that is a solution to both equations. to solve a system of linear equations graphically we graph both equations in the same coordinate system