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Mathematics 21 Online
OpenStudy (anonymous):

Math help needed asap.

OpenStudy (anonymous):

@jim_thompson5910

jimthompson5910 (jim_thompson5910):

what's your question?

OpenStudy (anonymous):

I have a few here is one Write an equation for each translation of y=|x|. 5.5 units right y = | x | – 5.5 y = | x – 5.5 | y = | x + 5.5 | y = | x | + 5.5

jimthompson5910 (jim_thompson5910):

we're going 5.5 units to the right, so we simply replace 'x' with 'x-5.5' to get this `y = | x – 5.5 |`

OpenStudy (anonymous):

Thanks. can you help me with others?

jimthompson5910 (jim_thompson5910):

sure

OpenStudy (anonymous):

A line passes through (2, –1) and (8, 4).Write an equation for the line in point-slope form. Rewrite the equation in standard form using integers. y – 2 = 5/6(x + 1); –5x + 6y = 17 y – 1 = 5/6(x – 2); –5x + 6y = 16 y + 1 = 5/6(x + 2); –5x + 6y = –16 y + 1 = 5/6(x – 2); –5x + 6y = –16

OpenStudy (anonymous):

Write an equation for each translation of y=|x|. 7 units right y = | x + 7 | y = | x | – 7 y = | x – 7 | y = | x | + 7

jimthompson5910 (jim_thompson5910):

same idea, but instead of 5.5 you use 7 this time

OpenStudy (anonymous):

C?

jimthompson5910 (jim_thompson5910):

yeah

OpenStudy (anonymous):

Can you help me with the other question?

jimthompson5910 (jim_thompson5910):

what is it

OpenStudy (anonymous):

A line passes through (2, –1) and (8, 4).Write an equation for the line in point-slope form. Rewrite the equation in standard form using integers. y – 2 = 5/6(x + 1); –5x + 6y = 17 y – 1 = 5/6(x – 2); –5x + 6y = 16 y + 1 = 5/6(x + 2); –5x + 6y = –16 y + 1 = 5/6(x – 2); –5x + 6y = –16 6

jimthompson5910 (jim_thompson5910):

what's the slope?

OpenStudy (anonymous):

Slope-intercept form: An equation of the form y = mx + b, where m is the slope and b is the y-intercept.

jimthompson5910 (jim_thompson5910):

what is the slope of the line through (2, –1) and (8, 4) use the slope formula to figure this out

OpenStudy (anonymous):

4/3?

jimthompson5910 (jim_thompson5910):

no

jimthompson5910 (jim_thompson5910):

did you use \[\Large m = \frac{y_{2}-y_{1}}{x_{2}-x_{1}}\]

OpenStudy (anonymous):

I think I did it backwards.

OpenStudy (anonymous):

-1 - 4 /2 - 8

OpenStudy (anonymous):

-5/6

jimthompson5910 (jim_thompson5910):

-1 minus 4 = -5 2 minus 8 = -6 -5 over -6 = 5/6

OpenStudy (anonymous):

how do i write it out?

jimthompson5910 (jim_thompson5910):

the slope?

OpenStudy (anonymous):

yes

jimthompson5910 (jim_thompson5910):

by using the formula I posted

jimthompson5910 (jim_thompson5910):

|dw:1446090183763:dw|

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