Question 1133367

The linear function goes through (-2,-2) and (4,-20):

f(x) = mx + b<br>

m = (-20-(-2))/(4-(-2)) = -18/6 = -3<br>

f(x) = -3x + b<br>

Using (-2,-2), solve for b:
-2 = -3(-2) + b 
-8 = b<br>

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Ans: {{{ highlight(f(x) = -3x - 8) }}}
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Check:  f(-2) = -3(-2)-8 = 6-8 = -2  (ok)
    and  f(4) = -3(4)-8 = -12-8 = -20 (ok)