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Mathematics 9 Online
OpenStudy (anonymous):

Math Help?

OpenStudy (mathmale):

Please present the problem FIRST and then ask for whatever specific help you need.

OpenStudy (anonymous):

Will you help me? y = 5•2x The graph is a parabola with vertex (0, 5). The graph is of exponential decay. The graph is of exponential growth. The graph is an absolute value function with vertex (0, 5). I have another one also.

OpenStudy (mathmale):

First please verify that I understand what you have typed in: y = 5 times (2x) I suspect that some key info is missing here.

OpenStudy (anonymous):

that is what it ask me in the question

OpenStudy (anonymous):

Describe the graph of the function.

OpenStudy (mathmale):

5 times 2x is simply 10 x. Describe the graph of y = 10x. What is the slope? the y-intercept?

OpenStudy (anonymous):

it is either A or D. A-The graph is a parabola with vertex (0, 5). D-The graph is an absolute value function with vertex (0, 5).

OpenStudy (anonymous):

@jim_thompson5910

jimthompson5910 (jim_thompson5910):

The equation is this? \[\Large y = 5*2^x\]

OpenStudy (anonymous):

Yes

jimthompson5910 (jim_thompson5910):

Use this grapher https://www.desmos.com/calculator and tell/show me what you get

jimthompson5910 (jim_thompson5910):

you'll need to type in `y = 5*2^x` the `^` means exponent

OpenStudy (anonymous):

The graph is a parabola with vertex (0, 5).?

jimthompson5910 (jim_thompson5910):

show me what graph you got

OpenStudy (anonymous):

jimthompson5910 (jim_thompson5910):

that's NOT a parabola a parabola is something like this |dw:1449113945583:dw| notice how it's symmetrical and U shaped. What you have is an exponential curve. Is it growing? or decaying?

OpenStudy (anonymous):

exponential growth?

jimthompson5910 (jim_thompson5910):

yep, it keeps going up forever

OpenStudy (anonymous):

what about this one?

jimthompson5910 (jim_thompson5910):

use polynomial long division or synthetic division

jimthompson5910 (jim_thompson5910):

this article may help http://www.purplemath.com/modules/polydiv2.htm

OpenStudy (anonymous):

When I do I get this. @jim_thompson5910

jimthompson5910 (jim_thompson5910):

I recommend doing it by hand. Don't rely on a calculator or solver

OpenStudy (anonymous):

For the answer is it - or +?

jimthompson5910 (jim_thompson5910):

|dw:1449114759888:dw|

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