exam Maths Puzzle Numerical Ability

Could someone please explain how to work out this problem?
Write the equation of the line with slope -2 and passes through the point (-1,5)
Then write the equation in standard form.
Thanks

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I need help using the intercpet to graph this equation

x+2y=4 If h(x) = f(x) - 3, what would the new coordinates of P be after the shift? I need an anser in (x,y) form. The instructor would talk about the problems, but I am one where you see one, then I can do one. Please help. Thank you.