Asked by Gaby

Write the equation of the line that passes through the points (1, 7) and (5, 15) using function notation.  
y = 2x + 5
y = 4x + 8
f(x) = 2x + 5
f(x) = 4x + 8
Answered by Damon
slope = (15-7)/(5-1) = 8/4 = 2
f(x) = 2 x + b
now find b
7 = 2(1) + b so b = 5
so
f(x) = 2x + 5
Answered by GIGI
Write the equation of the line that passes through the points (3, 6) and (4, 10) using function notation.
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