point slope form
y-y1 = m(x-x1)
y-6 = 2(x-2)
from the answers shown, should the slope be 5?
then the answer would be
y-6 = 5(x-2)
Choice A
Graphing them and see what the difference is
Let's use the slope-intercept equation:

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d)
Im not in this math section yet but i think that you can look it up as a worksheet and find the answer on google.