The tax on a $80 item is $3.20. Find the tax on a $140 item. What is the tax?
1 answer:
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As given,
"tangent line to f(x) is tangent at (7,5)", therefore f(7)=5.
Line is tangent at (7,5) and passes through (0,4), therefore the slope of the line is the slope of f(x=7) = f'(7).
"tangent line to f(x) is tangent at (7,5)", therefore f(7)=5.
Line is tangent at (7,5) and passes through (0,4), therefore the slope of the line is the slope of f(x=7) = f'(7).