Thread: Graph Help

1. Using the equations, give the points to plot a graph.
   

1. 1. y = 4x – 2 0 ≤ x ≤ 5
   2. y = -2x + 6 -3 ≤ x ≤ 5
   3. y = x2 + x – 6 -5 ≤ x ≤ 5

1. Remove the brackets of the following expressions
   
   
   1. (x + 2) (x + 3)
      
   2. (x + 2) (x - 5)
      
   3. (x - 5) (x - 1)
   4. ( x – 3) x + 4)
   
   

Originally Posted by Soul

1. Using the equations, give the points to plot a graph.
   

1. 1. y = 4x – 2 0 ≤ x ≤ 5
   2. y = -2x + 6 -3 ≤ x ≤ 5
   3. y = x2 + x – 6 -5 ≤ x ≤ 5

This page may be helpful if graphing on the TI-83:

Graphing Piece-wise functions on the TI-83.

1. Remove the brackets of the following expressions
   
   
   1. (x + 2) (x + 3) = x*x + x*3 + 2*x + 2*3 = ... (simplify)
      
   2. (x + 2) (x - 5)
      
   3. (x - 5) (x - 1)
   4. ( x – 3) x + 4)
   
   

Mine in red.

I do not have to plot the graph, I just need to find the points. But I have saved the site you sent might be useful in the future.

So I still have to simplify, to complete the equation, when removing the bracket?

I have gone to your recommended website but have not been able to access anything, If you comfortable using the website, can you give me some hints as to how to use the website.

Entering a Polynomial Function on a TI-83

Originally Posted by Soul

I do not have to plot the graph, I just need to find the points.

To find plot-points, pick any (allowable) x-value, plug it into the formula, and solve for the corresponding y-value.

Originally Posted by Soul

So I still have to simplify, to complete the equation, when removing the bracket?

To simplify multiplied polynomials, yes, you need to complete the multiplication. To learn how this works, try here.