7. Let f(x)=4x+7 and g(x)=3x-5. Find (g o f )(-4) A. -61 B. -32 C. -9 D. -64
2 answers:
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In the slope intercept form equation of a line (y=ax+b) a represents the slope, and b represents the intercept, which is -5. Thus, we know y=ax-5. The slope can be found by creating a fraction with the change in y value on top, and the change of x value on the bottom. If we have two points (4, 1) and (0, -5) we can put this into a fraction - 
, which simplifies down to -6/-4, or 3/2. Thus the answer is f(x)=
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