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This is just a matter of substitution. The original problems tells you what x is, x = -2. And your equation is y = -7x + 2. So everywhere you see x, you need to substitute it with -2. Then you can carry out the operation and solve for y. So, let's begin!

y = -7x + 2

Substitute x.

y = -7(-2) + 2

x is being multiplied by -7, so that is what you will do with -2. Now simplify.

y = 14 + 2

Multiplying two negatives numbers, give you a what? A POSITIVE!

y = 16

Always check your work.

16 = -7(-2) + 2

16 = 14 + 2

16 = 16

YAY!! YIPPEE!!

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15y ago

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Q: What is Y equals -7x plus 2 when x equals -2?
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