I am given equations for straight lines. Some are in the form y=mx+c (or y=mx+b as it might be in your part of the world). I need to put them in that form if possible because I am asked to find the gradient and y-intercept of them.
One of the straight lines is: 2y=6x-7 I know that I have to get the y by itself so I need to divide the 2y, 6x and -7 by two. I ended up with: y=3x-7/2
When showing how I got my answer do I keep the y-intercept as a fraction? When asked for the y-intercept do I give it as 7/2 or as 3.5? I would have thought as a decimal. Please help!
Also if the straight line is: y=4 Is the gradient 0 and the y-intercept 4? I'm pretty certain it is but I'm just making sure. Thanks for helping.
Also, If the straight line is x=-8 and I'm asked for the gradient and y-intercept is the answer 0 to both of them (gradient and y-intercept)? Thanks!
2007-02-21
20:03:15
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5 answers
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Anonymous
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Science & Mathematics
➔ Mathematics
I have another one where the y-intercept = 1/7. If I put it into decimal form it won't be the proper number (it will be an approximation). What do I do? Decimals or fractions for gradients and y-intercepts?
2007-02-21
20:15:12 ·
update #1
Do you think I'll get them wrong if I give them as fractions or improper fractions rather than decimals and mixed numbers? Would I be better of expressing them as fractions as well as mixed numbers rather than also improper fractions such as -7/2 would I be better of giving the y-intercept as 3 1/2?
2007-02-21
20:26:42 ·
update #2