2015
Mathematics
JAMB
Find the x and z intercepts of the graph of 3x - z ≤ 9
A.
(3, -9)
B.
(-3, 9)
C.
(-3, -9)
D.
(-3, 0)
Correct Answer: (3, -9)
Explanation
Starting from 3x − z ≤ 9 x = 0, substitute the value of x (i.e. x = 0) into the equation 3x − z ≤ 9 3(0) − z ≤ 9 z ≤ − 9 If z = 0 Then, 3x − 0 ≤ 9 3x ≤ 9 x ≤ 3 Intercept of x and z i.e (x,z) = (3, -9)
Starting from 3x − z ≤ 9 x = 0, substitute the value of x (i.e. x = 0) into the equation 3x − z ≤ 9 3(0) − z ≤ 9 z ≤ − 9 If z = 0 Then, 3x − 0 ≤ 9 3x ≤ 9 x ≤ 3 Intercept of x and z i.e (x,z) = (3, -9)THIS WEEK's
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