# SOLUTION: Use the graph of the function to estimate: a. f(2) b. f(–4) c. All x such that f(x) = 0 I can't show the graph on here it won't copy and paste, but I dont' understand wha

Algebra ->  -> SOLUTION: Use the graph of the function to estimate: a. f(2) b. f(–4) c. All x such that f(x) = 0 I can't show the graph on here it won't copy and paste, but I dont' understand wha      Log On

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 Click here to see ALL problems on Linear-equations Question 707634: Use the graph of the function to estimate: a. f(2) b. f(–4) c. All x such that f(x) = 0 I can't show the graph on here it won't copy and paste, but I dont' understand what I need to do. Please help. Found 2 solutions by Edwin McCravy, Edwin Parker:Answer by Edwin McCravy(9717)   (Show Source): You can put this solution on YOUR website!```Let's use this graph: a. f(2) This says: Find 2 on the x axis. Then go vertically from there to the graph, and give the value of y there. The value of y there is -3. The point there is (2,-3). So you write this: f(2) = -3 ------------------------------- b. f(–4) This says: Find -4 on the x axis. Then go vertically from there to the graph, and give the value of y there. The value of y there is 2. The point there is (-4,2). So you write this: f(-4) = 2 ------------------------------- c. All x such that f(x) = 0 This asks in reverse what the other two asked. They gave you a value of x and asked for the corresponding value for y. This gives you a value of y and asked for the corresponding value(s) for x. So you look along the graph and find where the graph has a y value of 0, and give the x values that correspond to a y of zero. You will see three such points on the graph. They are (-5.5,0), (-2,0), (3,0), So you write: f(-5.5) = 0, f(-2) = 0, and f(3) = 0 --------------------------- It's nothing hard at all, as there is nothing to calculate. It's just a matter of looking and seeing. They're just wanting you to learn functional notation. f(2) = -3 merely says "The graph contains the point (2,-3)." f(-4) = 2 merely says "The graph contains the point (-4,2)." f(3) = 0 merely says "The graph contains the point (3,0)." f(-2) = 0 merely says "The graph contains the point (-2,0)." f(-5.5) = 0 merely says "The graph contains the point (-5.5,0)." "f(x)" means the same thing as "y". Edwin``` Answer by Edwin Parker(36)   (Show Source): You can put this solution on YOUR website!```Let's use this graph: a. f(2) This says: Find 2 on the x axis. Then go vertically from there to the graph, and give the value of y there. The value of y there is -3. The point there is (2,-3). So you write this: f(2) = -3 ------------------------------- b. f(–4) This says: Find -4 on the x axis. Then go vertically from there to the graph, and give the value of y there. The value of y there is 2. The point there is (-4,2). So you write this: f(-4) = 2 ------------------------------- c. All x such that f(x) = 0 This asks in reverse what the other two asked. They gave you a value of x and asked for the corresponding value for y. This gives you a value of y and asked for the corresponding value(s) for x. So you look along the graph and find where the graph has a y value of 0, and give the x values that correspond to a y of zero. You will see three such points on the graph. They are (-5.5,0), (-2,0), (3,0), So you write: f(-5.5) = 0, f(-2) = 0, and f(3) = 0 --------------------------- It's nothing hard at all, as there is nothing to calculate. It's just a matter of looking and seeing. They're just wanting you to learn functional notation. f(2) = -3 merely says "The graph contains the point (2,-3)." f(-4) = 2 merely says "The graph contains the point (-4,2)." f(3) = 0 merely says "The graph contains the point (3,0)." f(-2) = 0 merely says "The graph contains the point (-2,0)." f(-5.5) = 0 merely says "The graph contains the point (-5.5,0)." "f(x)" means the same thing as "y". Edwin```