A line has a slope of -8 and includes the points (-10, 0) and (-9, z). What is the value of Z?
2 answers:
Answer:
Step-by-step explanation:
Let L be the given line, then, with a slope of -8
L : y = -8x + b
where b is to be determined from the included point A(-10,0).
Substitute point A in L to get
0 = -8 (-10) + b
solve to get
b = -80
therefore
L : y = -8x -80
Now substitute B(-9,z) in L
z = -8(-9) - 80 = -8
Answer:
z = -8
Step-by-step explanation:
Given coordinate points are:
(-10 , 0) = (x1 , y1)
(-9 , z) = (x2 , y2)
slope ( m) = y2-y1/x2-x1
-8 = z - 0/-9 - (-10)
-8 = z/-9 + 10
-8 = z/1
-8*1 = z
-8 = z
therefore the value of z is -8.
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