Thread: What graph would be a straight line?

1. What graph would be a straight line?

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3. Originally Posted by colby2152
You must be a member to view such images. All I/we see is blank.
The tip is to substitute, for example in the first question, $R_p$ by x.
If $\sqrt{v_{esc}}=kx$, where k is a constant, then it's a line.
For the fourth one, substitute $x=\frac{1}{R_p}$ and see if $v_{esc}=k' \ x$, where k' is also a constant.