Answer:
slope is 2
Step-by-step explanation:
Let the equation be y = mx +c , which is general form of equation for straight line or linear equation.
where m is slope , c is y intercept and ( x , y ) are ordered pair.
putting all the given values,
( refer attachment )
x=5,y=5,z=5
x=15-y-z
15-y-z-y+z=5
15-2y=5
y=5
x+y+z=15
15-2y+y+z=15
15-10+5+z=15
z=5
x-y+z=5
x-5+5=5
x=5
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