How to figure out y=mx+b?

first find the slope. it is done by finding rise over run. say the slope is 3. then M is 3. y=3x+b then pick a point on the graph. find the coordinates for that point. we can use an example of (5,-7) replace y and x with these coordinates -7=(3)(5) + b multiply 3 by 5 to get 15, move the 15 over to the other side of the equation by subtracting it from both sides, and you get -22=b so you have the equation! y=3x-22

To figure out y = mx + b, you are usually given two points on a graph: (X1, Y1) and (X2, Y2) The formula for slope is: (Where "m" is slope) m = (Y2 - Y1) / (X2 - X1) After you have "m" The formula for the line is: y - Y1 = m(x - X1) For example: Your two points are (3, 5) and (5, 9) X1 = 3, Y1 = 5, X2 = 5, Y2 = 9 m = (9 - 5) / (5 - 3) m = 4/2 = 2 y - Y1 = m(x - X1) y - 5 = 2(x - 3) y - 5 = 2x - 6 y = 2x - 1

y = mx + b is the equation of a line, where m is the slope and b is the y-intercept. m is in the form of a fraction: rise/run. Ex: 1/2 ---> move 1 unit up and 2 units to the right to find your next point. (or 1 unit down and 2 units to the left. graph it; you'll see what i mean.) -1/2 ---> 1 unit down and 2 units to the right. (or 1 unit up and 2 units left) if it is in the form of a decimal, just change it to a fraction. b is where the line meets with the y-axis. ex: if b = 2, the line meets at (0,2). if b = -2, the line meets at (0.-2). i really hope this helps! :)

Go here: http://www.wolframalpha.com Input y = 2x If you look at the graph, you will notice it is a straight diagonal line. Simple algebra: find the (x,y) coordinates if x = 3 for the function y = 2x. y = 2(3) y = 6 Therefore, the coordinates are (3,6) Input y = 2x + 2 Look at the graph, and you will notice that the diagonal line has raised up (up and down is y-axis) by 2 units. Find the (x,y) coordinates if x = 5 for the function y = 2x + 2. y = 2(5) + 2 y = 12 Therefore, the coordinates are (5,12).

y=mx+b is just a format for the equation for graphine a line. It goes like this: The Y-Value is equal to Slope(m) times the X-Value+the Y-Intercept (b)

m is slope (change in y divided by change in x) b is y-intercept (where the equation crosses the x-axis)

m is the slope. try a math book.

y = mx + b is the equation of a line, where m is the slope and b is the y-intercept. m is in the form of a fraction: rise/run. Ex: 1/2 ---> move 1 unit up and 2 units to the right to find your next point. (or 1 unit down and 2 units to the left. graph it; you'll see what i mean.) -1/2 ---> 1 unit down and 2 units to the right. (or 1 unit up and 2 units left) if it is in the form of a decimal, just change it to a fraction. b is where the line meets with the y-axis. ex: if b = 2, the line meets at (0,2). if b = -2, the line meets at (0.-2). i really hope this helps! :)

To figure out y = mx + b, you are usually given two points on a graph: (X1, Y1) and (X2, Y2) The formula for slope is: (Where "m" is slope) m = (Y2 - Y1) / (X2 - X1) After you have "m" The formula for the line is: y - Y1 = m(x - X1) For example: Your two points are (3, 5) and (5, 9) X1 = 3, Y1 = 5, X2 = 5, Y2 = 9 m = (9 - 5) / (5 - 3) m = 4/2 = 2 y - Y1 = m(x - X1) y - 5 = 2(x - 3) y - 5 = 2x - 6 y = 2x - 1