The graph of __ is a dilation and a reflection of the graph of f(x) = bx across the x-axis. A)
g(x)=bx − 3

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B)
g(x)= –3bx

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C)
g(x)=13bx

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D)
g(x)=bx − 13

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Astudent must have an average on five test that is greater than it equal to 80% but less than 90% to receive a final grade of b. devon's greades on the first four test were 78% 62% 91% and 80% what range if grades on the fifth test would give him a b in the course? ( assuming the highest grade is 100%)