Write an exponential function y=ab^x for a graph that includes (1,15) and (0,6). a. y=6(2.5)^x b.y=3(5)^x c.y=2.5(6)^x d.y=5(3)^x

asked Dec 16, 2017 40.9k views

3 votes

Write an exponential function y=ab^x for a graph that includes (1,15) and (0,6).

a. y=6(2.5)^x
b.y=3(5)^x
c.y=2.5(6)^x
d.y=5(3)^x

by Wooer

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7 votes

Correct answer is A.

$(1,15),(0,6) \\y=ab^x \\15=ab \\6=ab^0 \\a=6 \\b= (15)/(6) = (5)/(2) =2.5 \\ \\y=6( 2.5)^x$

Lysanne answered Dec 21, 2017

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