Devon wants to write an equation for a line that passes through 2 of the data points he has collected. the points are (8, 5) and (–12, –9). he writes the equation 7x – 10y = 3. is this a good model? explain your reasoning.

(8,5)(-12,-9)
slope = (-9 - 5) / (-12 - 8) = -14/-20 = 7/10

y = mx + b
slope(m) = 7/10
use either of ur points(8,5)x = 8 and y = 5
now we sub and find b, the y int
5 = 7/10(8) + b
5 = 56/10 + b
5 - 56/10 = b
50/10 - 56/10 = b
-3/5 = b

so ur equation is : y = 7/10x - 3/5now we put it in standard form

y = 7/10x - 3/5...multiply by 10
10y = 7x - 6subtract 7x
-7x + 10y = -6multiply by -1
7x - 10y = 6

So7x - 10y = 3 IS NOT a good model. Because ur points are not a solution to ur equation.

Answer to your question: a. the fundamental theorem of algebra tells you that the equation will have two complex roots since the degree of the polynomial is 2. the roots are ​ x=1±i7√2 .number of roots=degree of polynomialhere, degree of polynomial is 2 so number of roots will be 2.hope it *_*