algebra
posted by Celina on .
I'm a little confused on how to solve this:
The number of cricket chirps per minute is given by
N(t) = 7.2t  32
Where t is the temperature in degrees Celsius.
a. Graph the equation N(t) = 7.2t  32
I have learned a few ways to graph equations. One way would be to use 32 as the yintercept and from there go up 7.2, over 1, etc. The other way would be to pick an x, or in this case, t value, multiply it by 7.2, subtract 32, and that would be the y value. I have tried both ways and gotten different results, so which way would be correct?
Thank you very much! Any help is appreciated!

both ways are correct, you must have made an error
method 1  slope yintercept
one point is obviously (0,32)
now from there go up 7.2 then to the right 1
this would give you (1,24.8)
join these two points
method 2: finding random ordered pairs
let t = 1, N(1) = 7.232 = 24.8  (1,24.8)
let t = 3 N(3) = 10.4  (3,10.4)
join these points, bet you get the same line 
Thank you so much!