<PRE><B>Question 806939</B>
You need two points on the line in order to graph it, but first get the equation in slope-intercept form: y = mx + b 
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For this problem, t (normally x) is plotted along the horizontal axis, and d (normally y) is plotted along the vertical axis.
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d = 240 - 15t
d = -15t + 240
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Plug-in two different t values in the equation to get their d values, like so: 
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Point p1, use t=0:
d = -15(0) + 240
d = 240
p1 = (0, 240) 
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Point p2, use t=1:
d = -15(1) + 240
d = 225
p2 = (1, 225) 
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Now draw a line between points p1 and p2 to graph the equation. 
The line extends infinitely beyond both points.
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https://sooeet.com/math/linear-equation-solver.php
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https://sooeet.com/math/quadratic-formula-solver.php
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https://sooeet.com/math/linear-regression.php</PRE>