How do i find the answer to these questions

Step-by-step explanation: sorry, I’m not in this math yet.

y=2x+8

Step-by-step explanation:

First let's understand what some variables mean.

x is your x value.

y is your y value.

Let's say you have two coordinate points. (1,2) and (9,8)

If the equation had x1, that means you would look at your first coordinate point, (that's what the 1 stands for ;)) and the x value of the coordinate. So in this example, x1 would be 1.

The applies to x2, y1, and y2 as well.

m is typically your slope.

b is your slope intercept.

To find the answers to these equations, you can apply the slope formula which is (y2-y1)/(x2-x1). Then, you would plug the slope as well as a coordinate point into point-slope form, y-y1=m(x-x1). And then convert the point-slope form into slope-intercept form, which is y=mx+b.

This might seem confusing, but after some practice you'll understand.

Let's look at the first problem. Let's use the first two points, (x and y pairs.)

We have (2,12) and (4,16). We can use the slope formula, and substitute in our points. (16-12)/(4-2)=4/2=2 Our slope is 2.

Now we can substitute the slope, and any point of our choice into point slope form.

y-12=2(x-2)

y-12=2x-4

y=2x+8

Edit: Just to clarify, because the slope intercept form is y=mx+b, and b stands for the y-intercept, your y-intercept would be 8.

Hope this helps!

i know the answer is 3

step-by-step explanation:

the answer is (4,3)

since the rule for r0, 90º is (-y,x) and it was already applied to form the image, all you have to do is reverse the answer using this formula.