Instead of saying "looks like a smile," mathematicians say CONCAVE UP. Likewise, instead of "looks like a frown," mathematicians say CONCAVE DOWN.

Drag the blue points to create a concave down parabola with vertex (4,-2).

what?

step-by-step explanation:

40% off the regular price is the correct answer.

step-by-step explanation:

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)

48 / 6 = x

in this case, x will equal the amount of money in each card!

x therefore will be 8.

trent had $8 in each birthday card.