Basically here all you want to do it substitute the values x=1 and x=2 for the given function. Use your slope formula
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Do same for x=3 and x=4
You next divide plug in values in to this expression:

The answer is A. You have to use pathagoream theorem
Answer:
it is a function
Step-by-step explanation:
Answer:
y= -3
Step-by-step explanation:
adding both the equation we get x= 7
and then put value of x in any one equation u will get y as -3