Find f(-2) if
f(x) = x4 + 2x² - 1

23.

Step-by-step explanation:

Replace the x by -2 and simplify:

f(-2) = (-2)^4 + 2(-2)^2 - 1

= 16 + 2*4 - 1

=  16 + 8 - 1

= 23.

c. y = 1/4 x + 5

step-by-step explanation:

first, put the equation of the line on the graph into slope-intercept form

(y = mx + b):   y = -4x + 8

second, a perpendicular line has to have "an opposite/reciprocal slope" to the original slope. so, find the "m" value in your original equation (it's -4, right? )

original slope: m = -4   perpendicular slope: change the sign to its opposite and find the reciprocal ("flip" the number)

new slope is now positive (b/c the original slope was negative 4), and it's 1/4 (not the original slope of 4 or 4/1)

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step-by-step explanation:

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