Beginning User Question

Justing6

Hey everyone, I just got SpaceTime 4.0 for my iPhone and it has worked very well. One quick question though, how do you graph multiple lines on the same graph while they are in standard form or y-intercept form? Thanks ahead of time!

Desa

You can plot multiple lines using a list and pressing plot.
[3x+2,4x-1,12x+3]

You can also use the plot function.
Plot([3x+2,4x-1,12x+3])

Justing6

Thanks! I was typing the y= or f(x)= in front of each equation. I know SpaceTime can graph standard form (Ax+By=C), but is there any was it can graph more than one standard form without converting into y-int?

Desa

Are you having a problem with a specific equations? SpaceTime can graph any type of 2D function.

Justing6

I am not really having trouble with a specific equation, but more with a form of an equation. The only way I see that you can graph multiple equations is if they are in f(x)=mx+b form, where you emit the f(x). So you end up with [mx+b,mx+b,mx+b,etc.]. I was wondering if you could graph multiple equations in the form of Ax+By=C, such as [Ax+By=C,Ax+By=C,etc.]. However, [4x+3y=12,3x+4y=12] returns Function: Plot, Error: Unable to Plot. Both these equations can be typed into SpaceTime alone and it will plot the line. These equations can be reconfigured to f(x)=mx+b form, but I was just wondering if there was a way to plot both of them on the same graph WITHOUT converting them to the other form.

Desa

You can do this one of two ways.

Plot(Solve(4x+3y=12,y),Solve(3x+4y=12,y))

ImplicitPlot([4x+3y=12,3x+4y=12])

Justing6

Thank you so much! I was unaware of ImplicitPlot command.

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