Mathematics
6 Online
OpenStudy (anonymous):
model the function rule y=2x-3 with a table of values. show your work. PLEASE HELP
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OpenStudy (anonymous):
@Mariam.A
jimthompson5910 (jim_thompson5910):
|dw:1416982832347:dw|
jimthompson5910 (jim_thompson5910):
plug in x = 0
y=2x-3
y=2(0)-3
y = 0 - 3
y = -3
so when x = 0, the value of y is y = -3
|dw:1416982877962:dw|
jimthompson5910 (jim_thompson5910):
Now let's say x = -1
y=2x-3
y=2(-1)-3
y = -2 - 3
y = -5
so when x = -1, the value of y is y = -5
|dw:1416982932721:dw|
jimthompson5910 (jim_thompson5910):
I'll do the rest of the table
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OpenStudy (anonymous):
i dont know how to make that graph on Microsoft word tho. I'm online school. but okay thank you very much!!
jimthompson5910 (jim_thompson5910):
well you can draw out a grid and plot 2 points on it
then connect those two points with a straight line
jimthompson5910 (jim_thompson5910):
the points will come from the table
OpenStudy (anonymous):
okay, well can you help me with the rest of the table please
jimthompson5910 (jim_thompson5910):
sure, let's say x = -2
what is the value of y when x = -2 ?
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OpenStudy (anonymous):
i dont know... tbh
jimthompson5910 (jim_thompson5910):
y=2x-3
y=2(-2)-3 ... replace x with -2
y = ???
OpenStudy (anonymous):
-7 ?
jimthompson5910 (jim_thompson5910):
yes
jimthompson5910 (jim_thompson5910):
|dw:1416983616513:dw|
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jimthompson5910 (jim_thompson5910):
what is the value of y when x = -3?
OpenStudy (anonymous):
-9 ??
jimthompson5910 (jim_thompson5910):
correct
jimthompson5910 (jim_thompson5910):
|dw:1416983763601:dw|
jimthompson5910 (jim_thompson5910):
we could go on forever in that direction, but let's stop at x = -3
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jimthompson5910 (jim_thompson5910):
let's focus on the positive whole numbers now
what is the value of y when x = 1 ?
OpenStudy (anonymous):
-1 ??
jimthompson5910 (jim_thompson5910):
yes
|dw:1416983969997:dw|