Write the equation of the line that passes through the points (3, 6) and (5, 18) using function notation. (5 points) f(x) = 2x 12 f(x) = 6x − 12 y = 2x 12 y = 6x − 12

(3,6)(5,18)
slope = (18 - 6) / (5 - 3) = 12/2 = 6

y = mx + b
slope(m) = 6
(3,6)x = 3 and y = 6
now we sub and find b, the y int
6 = 6(3) + b
6 = 18 + b
6 - 18 = b
-12 = b

equation is : y = 6x - 12
function notation is : f(x) = 6x - 12

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