I have done several of these already. Please observe the method I have used and make an attempt yourself. We will be glad to critique your work.
You have asked two questions here.
In the first case, the equation you are after will have the form
y = -(3/5)x + b
Use the fact that y = 5 when x = 0 to get b.
Rewrite into standard form (0,5), m=-3/5.
Write the equation of the line passing through each of the given pairs of points. Write the answer in slope-intercept form, where possible. (2,-3) and (2,4)
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