Hello, I don’t understand this any help would be appreciated thank you.

Find slope intercept form

Step-by-step explanation:

When you have 2 points, you can find the slope of the line.

Use the y-intercept as a point like (0, y) and the given point (4, 90) to find the slope.

Using this:

Knowing that y=mx+b, plug in either set of points and the slope as m to find b.

Or, because you are already given the y-intercept and b is the y-intercept, fill in b with that y coordinate.

Now rewrite in slope intercept form (y= mx+b), fill in m and b, and you're done!