JAMB - Mathematics (2015 - No. 6)

Find the x and z intercepts of the graph of 3x - z \(\leq\) 9
(3, -9)
(-3, 9)
(-3, -9)
(-3, 0)

Explanation

Starting from 3x − z \(\leq\) 9

x = 0, substitute the value of x (i.e. x = 0) into the equation 3x − z \(\leq\) 9

3(0) − z \(\leq\) 9

z \(\leq\) − 9

If z = 0

Then, 3x − 0 \(\leq\) 9

3x \(\leq\) 9

x \(\leq\) 3

Intercept of x and z i.e (x,z)

= (3, -9)

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