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I don’t understand this helppp

I don’t understand this helppp-example-1

2 Answers

5 votes

Answer:

Scan it and you get the answer

User Thomas Van Holder
by
7.9k points
4 votes

Answer:

B

Explanation:

what is f(x) usually "called" ?

right, y !

the secant line is a line (just a simple, straight line) through 2 points of the other curve.

that means, both points are on the curve AND on the line.

and that means that their y value must be the result of both equations, when the corresponding x value is used.

so, for point 1 we have x = -1.

y = f(-1) = -1⁵ - 2×-1³ = -1 - 2×-1 = -1 + 2 = 1

so, point 1 is (-1, 1)

for point 2 we have x = 0

y = f(0) = 0⁵ -2×0³ = 0

so point 2 is (0, 0)

now, all answer options except C also contain (0, 0).

for C to be correct it would mean that 0 = -1.

and that is definitely wrong.

that leaves A, B, D, E

which one also contains the point (-1, 1) ?

A says then 1 = -2×-1 = 2. that is wrong.

B says 1 = - -1 = 1. that is correct.

D says 1 = -1. that is wrong.

E says 1 = 3×-1 = -3. that is wrong.

so, B is the right answer.

User Lotfio
by
9.0k points

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