What exactly are you having a difficult time with? The questions around 19, 21, 23, and maybe 25 are pretty tough! Just do your best to find a way to write an equation with those points. Think about how easy it would be to use one form over the other's given specific information. For example, if you're given the x-int and y-int, start with factored form because this is where you typically see the x-int. Now, obviously if you distribute you won't have the correct "c" or y-int. So, take your factored form and figure out what "a" has to be (should be on the outside of the factors) by plugging in 0 for x. The y-int occurs when x=0. Hope that helps!
What exactly are you having a difficult time with? The questions around 19, 21, 23, and maybe 25 are pretty tough! Just do your best to find a way to write an equation with those points. Think about how easy it would be to use one form over the other's given specific information. For example, if you're given the x-int and y-int, start with factored form because this is where you typically see the x-int. Now, obviously if you distribute you won't have the correct "c" or y-int. So, take your factored form and figure out what "a" has to be (should be on the outside of the factors) by plugging in 0 for x. The y-int occurs when x=0. Hope that helps!
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