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Mathematics 22 Online
OpenStudy (anonymous):

Consider the function y=x^2+5x-2. What would happen to the graph if (x + 5) was substituted in place of the x? A. The graph would shift up 5 units. B. The graph would shift down 5 units. C. The graph would shift 5 units to the right. D. The graph would shift 5 units to the left. ***Please explain! thanks ;)

jimthompson5910 (jim_thompson5910):

use the rule for f(x) becoming f(x+5)

OpenStudy (anonymous):

so i get y=(x+5)^2+5(x+5)-2 ?

jimthompson5910 (jim_thompson5910):

yes, but what is the rule

OpenStudy (anonymous):

idk :(

jimthompson5910 (jim_thompson5910):

look at the first attachment you posted in the other question

OpenStudy (anonymous):

do u mean this one?

jimthompson5910 (jim_thompson5910):

yes

jimthompson5910 (jim_thompson5910):

look at rule #3

OpenStudy (anonymous):

if c>0, y=f(x+c) moves left c units ??that one?

OpenStudy (anonymous):

and c is -2 right?

jimthompson5910 (jim_thompson5910):

no

jimthompson5910 (jim_thompson5910):

compare (x+c) with (x+5)

OpenStudy (anonymous):

so 5 is c?

jimthompson5910 (jim_thompson5910):

it is, which means?

OpenStudy (anonymous):

so my answer is this?? D. The graph would shift 5 units to the left.

jimthompson5910 (jim_thompson5910):

good

OpenStudy (anonymous):

yay! thanks :)

jimthompson5910 (jim_thompson5910):

sure thing

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