Graph basic functions of one variable

[zjb0417]

I am having trouble working out the 2 problems below. Can anyone offer advice?

1. Graph the function f(x) = –3x + 7. Be sure to properly label the graph, which includes labeling the axes and the line with its equation.

2. Graph the function f(x) = –3x2 + x – 5. Be sure to properly label the graph, which includes labeling the axes and the graph with its equation.

 

[stapel]

I am having trouble working out the 2 problems below. Can anyone offer advice?

It might help if you stated which part of the process is causing you trouble...?

Since you're graphing quadratics in function notation, you've obviously already done plenty of linear graphing. Since "y = -3x + 7" is exactly the same thing as "f(x) = -3x + 7", where, exactly, are you stuck?

Since the process for graphing quadratics is the same as the process for graphing straight lines (pick a bunch of x-values, plug them in, find the corresponding y-values, draw the dots, sketch in the line), where, exactly, are you stuck?

You posted this to "Intermediate/Advanced Algebra", which means you've already completed at least one previous algebra course, in which you naturally did loads of graphing. We'll be glad to try to find web lessons for you, or try to "talk" you through whatever is the difficulty in this instance, but you'll need to tell us what you've done and where you're stuck.

Please be specific. Thank you!

Eliz.