Question

draw a line and find the slope, please help (0,74),(1,34),(2,56) (3,72) (0,81) (1,34)(2,65)(3,73)(0,54)(1,47)(2,80)(3,57)

Answer 1

this isn't a function you have the same at least two outputs for x=2 and for x=3 and for x=0

Answer 2

Myininaya, you're correct, this is not a function, but you can use least-squares to find a line of best fit.

To do so, go to http://www.wolframalpha.com and type:

linear {(0,74),(1,34),(2,56),(3,72),(0,81),(1,34),(2,65),(3,73),(0,54),(1,47),(2,80),(3,57)}

Hope this helps.