What statement correctly describes the key features of the graph of f(x) = 4(1/2)^(x + 1) − 3?
Y-intercept of (0, −1), starts up on the left, gets closer to y = −3 on the right
Y-intercept of (0, −1), starts down on the left, gets closer to y = −3 on the right
Y-intercept of (0, 1), starts up on the left, gets closer to y = −3 on the right
Y-intercept of (0, 1), starts down on the left, gets closer to y = −3 on the right
Stacey Warren - Expert brainly.com
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to work out the y intercept put x = 0 into f(x) and work it out
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Okay did it now how do I solve?
what value did you get ?
= 4(1/2)^(0+1) - 3
= 2^1 - 3
so work out some values of f(x) for negative x's
like x = -2 2
f(-2) = 4 (1/2)^(-2+1) - 3 = 4 / (1/2) -3 = 5
f(-3) = 4(1/2)^-2 - 3 = 4 / 1/4 - 3 = 13
so the left side of the curve will descend pretty steeply
Oh okay so what's next?
for high values of x the curve will tend to approach -3
because 1/2 to a high power will approach zero and that leaved - 3
i'm not sure - i thought it would be up on the left
So A or B?
it starts at high value of f(x) on the left so i think it starts 'up on the left'
what do you think?