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The answer is about 0.02439.
I simply just put it into the calculator.
M= y1-y2/x1-x2
m= 8/10
m= 4/5
4q=
4 times q
q being the variable
hope this helps
Since 2 is a whole number , the 2 would go in front of the decimal , 2.00 like so , and since you have 7 tenths combined with the 2 and the tenths place is just after the decimal, it'd look like this 2.7