00:04
Okay, we want two ordered pairs in this form.
00:11
So looking at the thermometer, i see 20 celsius is 68 fahrenheit, and 10 celsius is 50 fahrenheit.
00:26
And we want to find the slope between those.
00:30
So we'll do change in y, 68 minus 50.
00:36
Over change in x, 20 minus 10.
00:42
So that is 18 over 10.
00:46
And if i divide by 2, that is 9 over 5.
00:53
Okay, so the slope is 9 5ths times our celsius.
01:00
And we can see on the thermometer that the 0 celsius is 32 fahrenheit.
01:07
So 32 would be our y intercept.
01:10
And that will equal fahrenheit.
01:18
Okay, then using the function we found, determine the celsius equivalent of 68 degrees fahrenheit.
01:25
So if 9 .5c plus c plus 32 is 68, then we will subtract the 32 from both sides.
01:39
9 .5c will equal 36...