Ioverthink everything, so forgive me for if i'm being asked "what is the area of a square with sides 25 inches long? " i'm doing is 25 x 25 = 625. right?

Yes you're right!
Area of a square is side × side

Where m is the slope of the line and b is the y-intercept of the line, or the y-coordinate of the point at which the line crosses the y-axis. to write an equation in slope-intercept form, given a graph of that equation, pick two points on the line and use them to find the slope. this is the value of m in the equation.