1) Which is exponential? a) y=(2)x b) y=x2 c) y=2x+1 d) y=3x2 2) In y=a(b)x, what is b? a) Y-intercept b) Exponent c) Slope d) Growth factor 3) What is the y-intercept of y=3(0.5)x? a) x b) 3 c) 3.5 d) 0.5 4) In y=a(b)x, if b is greater than 1, the function shows... a) Growth b) Decay c) Reflection d) Constant rate 5) In y=a(b)x, if b is less than 1, the function shows... a) Rotation b) Translation c) Growth d) Decay 6) What is the horizontal asymptote of y=2(1.5)x? a) y=1 b) x=0 c) y=0 d) x=1 7) What is the y-intercept of y=2(1)x? a) 1 b) 2 c) 3 d) x 8) What is the growth/decay factor of y=2(3)x? a) 2 growth b) 2 decay c) 6 growth d) 3 growth 9) What is the growth/decay factor of y=1.5(0.5)x? a) 0.5 decay b) 0.5 growth c) 1.5 growth d) 1.5 decay 10) Which function models decay? a) y=x3 b) y=(1/2)x c) y=3(2)x d) y=0.5(4)x 11) What is the initial value in y=4.2(1.5)x? a) 1.5 b) 5.7 c) 4.2 d) 3 12) What is the growth/decay factor of y=(0.5)x? a) x b) 1 c) 0 d) 0.5 13) What is the horizontal asymptote of y=3(2.5)x? a) y = 0 b) y = 3 c) x = 0 d) x = 3 14) In y=5(3)x, what is y-intercept? a) 15 b) 3 c) 5 d) 8 15) Which graph feature fits exponential growth? a) Drops quickly b) Straight line c) Parabola d) Rises faster 16) What is the domain of y=2x? a) Integers only b) All reals c) x≥0 d) x>0 17) What is the range of y=3(2)x? a) y>0 b) y≤0 c) All reals d) y≥0 18) What is the horizontal asymptote of y=1.5(5)x? a) y = 1.5 b) y = 0 c) x= 0 d) x = 1.5 19) What is the y-intercept? a) 1000 b) 0 c) 1250 d) 1

Exponential Functions

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