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Mathematics 18 Online
OpenStudy (anonymous):

how do you find the y intercept with fractions?

hartnn (hartnn):

to find y - intercept just plug in x=0 in your fraction

hartnn (hartnn):

do you have a specific example/problem you need help with ?

OpenStudy (anonymous):

6=3/8(-11)+b I get confused with fractions

hartnn (hartnn):

ok, but we need the function in terms of x and y to get the y -intercept that seems to be equation of line ? can you post the entire problem ?

hartnn (hartnn):

seems like you have y = 3/8 x + b and you need y-intercept ? is that correct ?

hartnn (hartnn):

and the point given is -11, 6

OpenStudy (anonymous):

Yeah

hartnn (hartnn):

ok, so we are here 6=3/8(-11)+b one simple thing you can do to eliminate the fraction, is you multiply everything (both sides) by the denominator. in this case , multiply both sides of 6=3/8(-11)+b by 8 what do u get ?

OpenStudy (anonymous):

48=3/8(-88)+b? Right?

hartnn (hartnn):

ok, you did 6*8 correctly but we multiplied 8 to eliminate the fraction 3/8 because (3/8)*8 = 3 right ? so you get 48 = 3(-11) + 8b got this ?

OpenStudy (anonymous):

Yeah

hartnn (hartnn):

good, so 3(-11) = -33 now we need the value of 'b' , which is your y-intercept so add 33 on both sides, what do u get ?

OpenStudy (anonymous):

81=8b

hartnn (hartnn):

correct! so, your y-intercept = b = 81/8 thats it!

OpenStudy (anonymous):

Ohhh OK I got it thank you(:

hartnn (hartnn):

welcome ^_^ since you are new here, \(\Huge \mathcal{\text{Welcome To OpenStudy}\ddot\smile} \) if you have any doubts browsing this site, you can ask me. Have fun learning with Open Study! :)

OpenStudy (anonymous):

OK thanks(:

hartnn (hartnn):

:)

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