Given the coordinate points (9,9) and (15,12). sara claims that the linear equation is y=1/3x-2 and brad says the equation is y=1/3x+6. construct your own function from these two data points to determine who is correct. show your work. next, create your own " who's right? " based on the example above and create a key

y = 1/2 * x + 4.5,   both Sara and Brad were wrong

Step-by-step explanation:

Line pass (9,9) and (15,12)

y = mx + b

m = difference of y/ difference of x = (12 - 9) / (15 - 9) = 1/2

y = 1/2 * x + 4.5

check Sara: y=1/3x-2     (9,9)   y = 1/3 * 9 -2 = 1 ≠ 9

check Brad  (9,9)      y = 1/3 * 9 + 6 = 9

                     (15,12)   y = 1/3 * 15 + 6 = 11 ≠ 12

m=-16

step-by-step explanation: