so the slope between (-2,4) and (c,-2) must be -2
(-2-4)/(c+2) = -2
-6 = -2c - 4
c = 2
3. slope of x+5y = 5 is -1/5
slope of 5x + py = 5 is -5/p
-5/p = -1/5
p = 25
4. slope for the 2 given points = (5+8)/(-2+3) = 13
y-5 = 13(x+2)
y = 13x + 31
13x - y = -31
5. try it
see which pair has the same slope
Thank you Reiny
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