Question 470297
  <pre><font face = "Tohoma" size = 4 color = "indigo"><b> 
Hi,
t=-2m+54 where m is the number of minutes since 9.00am that morning.
At 9:15, 15 minutes has passed, m = 15
 t = -2*15 + 54
 t = 24 degrees
{{{drawing(300,300,   -60, 60, -60, 60, grid(1),
circle(15, 24,1.8),
graph( 300, 300, -60, 60, -60, 60,0,-2x+54))}}}