Question 988922
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1. (2,-7), (5,-5)
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{{{m=(y[2]-y[1])/(x[2]-x[1])}}}
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{{{m=(-5-(-7))/(5-2)}}}
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{{{m=2/3}}}  
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ANSWER: Slope is 2/3.
The others are done the same way.
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4. (-3,-1),m=-1/5
Using slope intercept form:
y=mx+b
y=(-1/5)x+b Put in values for point given and solve for b.
-1=(-1/5)-3+b
(-5/5)=(3/5)+b
(-8/5)=b Substitute this for b to get the equation.
(b is the y intercept, so one point is (0,(-8/5)).
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y=(-1/5)x+(-8/5) Set y=0 to get x-intercept.
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0=(-1/5)x+(-8/5) 
(8/5)=(-1/5)x
-8=x The x-intercept is (-8,0)
Graph the two points and draw a straight line through them.
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{{{ graph( 500, 500, -10, 10, -10, 10, (-1/5)x-(8/5)) }}}