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advice on math
hi, i am in 8th grade math and I need a little help. We are learning to solve equations algebraically as well as graphically. I understand how to solve an equation algebraically but not graphically. Can someone please list the steps of solving an equation graphically?
the was the problem that was given to solve the problem graphically.
y= x^2 + 2x - 8
y= -2x-11
thank's a lot! you dont know how much you will be helping me =)
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Maybe give some free advice about: School?
1. Draw a table for each equation listing values for x and the resulting values for y. The usual thing would be to have a simple table with two rows (x on the top row and y on the bottom row). Sometimes you are given the highest and lowest values to use for x. If not start at 0 and go up to say 10/15/20. BUT looking at your second equation you should probably have some negative values for x. Perhaps you could try -10 to +10.
2. Draw the axes for a graph with the values from your tables.
3. Plot the points for each equation to draw a line for each.
4. Note the point or points where the two graphs cross. This will give you your solution(s).
I'm in no way a maths genius, but I think that's right.
Hope it helps, good luck.
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yeah i think i know what youu mean but i dont know if i'm correct here but i'm gonna trie
i think it means that y is x2+2x-8 so yeah my teacher said that x is always 1 so that would be 3+3-8= -2
y= -2
but i'm really not that sure.
and for the second one: y= 2+x = 3
3-11= -9
y= -9
okay i'm totally not that sure though but i hope i helped =) good luck
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check out this site, now I am no expert on math in any way shape or form, but this site looks good.
cheers
chris13
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