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Aedan Massey
Mathematics
13 June, 20:00
Find three solutions for y=-2x-1
+5
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Trystan Koch
13 June, 20:10
0
(1,-3), (2,-5), and (3,-7)
An easy way to find this is set you a definite y value. So try - 3 as the value for y. Solve for x as normal so - 3=-2x-1. Add 1 on both sides to get - 2=-2x. Divide on both sides by - 2 and get 1=x. Since the slope is - 2 you keep subtracting - 2 from - 3 and you'll get - 5 when x=2 and so on.
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Brandon Mcintosh
13 June, 20:26
0
(1, - 3)
(2, - 5)
(3, - 7)
Step-by-step explanation:
Randomly choose three values for "x". Substitute each of them separately into the formula to find the "y". Then write the solution as an ordered pair (x, y).
I will choose x=1, x=2 and x=3.
When x=1:
y = - 2x - 1
y = - 2 (1) - 1
y = - 2 - 1
y = - 3
(1, - 3)
When x=2:
y = - 2x - 1
y = - 2 (2) - 1
y = - 4 - 1
y = - 5
(2, - 5)
When x=3:
y = - 2x - 1
y = - 2 (3) - 1
y = - 6 - 1
y = - 7
(3, - 7)
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