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anonymous
 5 years ago
how do you write an equation from looking at a graph that already has the line drawn?
anonymous
 5 years ago
how do you write an equation from looking at a graph that already has the line drawn?

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anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0use the slope intercept form (y = mx + b), where m represents the slope and b represents the yintercept, look at the graph and find they y intercept, plug this value in for b, then find the slope and plug this value in for m

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0ok oneBIG problem, no has ever show me how to read graphs so I don't have a clue what I am looking at.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0look at the graph where does it cross the yaxis ( the one that goes up and down)? that is what is substituted in for b then look at the line from the yintercept, count how many units up and how many units over you have to go to get to the next point (this is the slope, plug it in for b), (example: if you count up 3 and right 5 the slope is 3/5)

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0ok up 3 over to the right 7 =3/7 right? then how do i figure for y=?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0y=mx + b, where m = slope, and b = yintercept

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0ok m = 3/5 and b=3???

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0cool I got one right. thank you very much

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0i had another one to do and the way you explained it I was able to do that one rather quickly

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0now if u can help me do the equation and then draw the line on a blank graph y=2x+5

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0m = 2, and b = 5 so go up 5 units on the yaxis and put a point, then count from the point (up 2, left 1) or (down 2, right 1) to find more points, then connect them to graph the line

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0ok how do u know if u go up 2 or down 2?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0if the slope is negative the line will tilt up on the left and down on the right, so (up 2, and left 1) will the same as (down 2 and right 1)

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0ok i see. thanks. now the next one is different. x+5y=10

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0you need to solve for y, so move the x to the right (5y = x + 10), then divide all the terms by 5 (y = 1/5x + 2), so the yintercept is 2, and the slope is 1/5 (up 1, left 5 or down 1, right 5)
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