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I need help finding the y-intercept of these, I am no good with slope and tables. ;-;

I need help finding the y-intercept of these, I am no good with slope and tables. ;-;-example-1
I need help finding the y-intercept of these, I am no good with slope and tables. ;-;-example-1
I need help finding the y-intercept of these, I am no good with slope and tables. ;-;-example-2
I need help finding the y-intercept of these, I am no good with slope and tables. ;-;-example-3
User Aziz Saleh
by
8.4k points

1 Answer

9 votes

Answer:

1. -4

2. 6

3. -6

(i hope this is right •_•)

Explanation:

First table

When the x coordinate is 0, that point is your y intercept. For the first one, your y intercept is -4.

Second table

For the second one, we need to do a bit of counting. We can see the x coordinates go before and after zero, but the table does not show us 0. So, we're going to have to calculate the slope. Bear with me here, I'm a little tired and this might be rambling ;-;

So, the formula for calculating slope is
(y_(2) -y_(1))/(x_(2)-x_(1)). I'm going to use those first two points to get my slope. We're going to say the first point is point 1 and the second point is point 2 (genius, i know lol). So, let's substitute in the x and y values.


(9-12)/(-3-(-6))

And simplify...


(-3)/(3)

So, your slope is -1. We can use that. We just have to count down.

If the x is -2, the y is 8. If the x is -1, the y is 7. And if the x is 0....(drumroll please) the y is 6! So, your y intercept is 6.

Third table

Now, this table isn't very nice either and doesn't have an x as 0 for us. Hmpf. But we can still do what we did above. I'll just skip the explanation and you can observe my steps.


(-3-(-5))/(9-3)


(2)/(6)


(1)/(3)

Let's count down....

If x = 3, y = -5

If x = 2, y = -5 1/3

If x = 1, y = -5 2/3

If x = 0, y = -6

User Coin Cheung
by
8.7k points

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