Question 522862
derive a linear polynomial function(in point slope form) with this information: 
y-intercept of 10, decreasing on [-2,-4] with a slope of -.5 
i have tried to do it myself, but i could not figure out the x-intercept. 
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Form: y = mx + b
m is the slope = -0.5
b is the y-intercept = 10
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Equation:
y = -0.5x + 10
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x-intercept ??
Let y = 0 and solve for "x";
0 = -0.5x + 10
0.5x = 10 
x = 20
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Cheers,
Stan H.
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