algebra
posted by Kristine .
I have a couple questions I need help on.
Which model is most appropriate for the data set?
(1,20),(0,10),(1,5),(2,20)
And
How many realnumber solutions does the equation have?
8x^28x2=0
Thanks for the help

on the first sets, each increase in x results in y being increased by 5 (assuming you have a typo in the third set, and it should read (1,15). So linear.
divide by 2
1+4x+4x^2=0
(1+2x)^2=0
x= 1/2, 1/2 so one real solution. 
Nope no typo on the third it is 20. Thanks Bob

Sorry it is 1,5