Answer:
y=mx+b
Step-by-step explanation: Linear lines on graphs are straight lines, and have the same slope for each point.
the slope of a line can be read y/x which is where you go up/down for the y value and left or right for x values. In the equation the variable that represents m.
The b is the y intercept or where the line meets the y axis.
the x stands for the x value that you can plug into the equation to solve for y.
Once you do that, if you need to you can plot a point on a graph with the y and x value (x,y)