Answer: y= 21x
Explanation:
As you can see, the line is steadily increasing. To make an equation for the line, we need to use the formula y=mx+b.
Step 1: Find the slope, "m"
m is the slope of the line, calculated by finding 2 points on the line, and using the formula rise÷run.
To do this, find a point on the line. (Make sure it's an actual point, not one that is in between the lines). In this example I will use 0,0. Then, find the nearest (actual) point on the line. That will be 1,21.
Now, we will use rise/run.
To get from the 2 points I listed, we must rise, or go up, 21. Then, we must "run", or go left or right 1. In this case we go left.
Therefore, the "rise"= 21, and the "run"= 1. Now 21÷1= 21, so the slope is 21.
Step 2: Find the y-intercept, "b"
b is the y intercept of the line, whch is the first point on the y axis that the line is on. In this line, the y intercept is 0.
Step 3: Write the equation
Now that we know what "m" and "b" stand for, we can replace these letters with the numbers by plugging in.
y=mx+b
y= 21x+0
y= 21x
*Note that when the y intercept ("b") is 0, you don't write it in the equation, but if it were a number other than 0, you would.
Hope this helps :)