Wow, I must say, if you cannot do those questions, then you are certainly not ready for your math exam
1. if the y-intercept is 0, doesn't that mean the line goes through the origin or (0,0) ????
so in y = mx + b form ...
y = (-1/5)x
multiply by 5
5y = -x
standard form has both x and y terms on the left, constants on the right, so
x + 5y = 0
y - 3 = -2x - 8
take the -3 to the other side ...
y = -2x - 5
3. slope = (-4 - (-4))/-5-1) = 0/-6 = 0
so you have a horizontal line !
look at the y values of your two points, both -4
As a matter of fact, your equation would simply be
y = -4
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