SOLUTION: Find the value of a: The line through (-2,a) and (a,3) has slope -1/2

Question 700731: Find the value of a:
The line through (-2,a) and (a,3) has slope -1/2
Answer by lwsshak3(11628) (Show Source): You can put this solution on YOUR website!
Find the value of a:
The line through (-2,a) and (a,3) has slope -1/2
**
Standard form of equation for a line: y=mx+b, m=slope, b=y-intercept
slope=∆y/∆x
=(3-a)/(a-(-2))
=(3-a)/(a+2)=-1/2
3-a=-a/2-1
a/2=4
a=8
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