Question 9 (Multiple Choice Worth 1 points) (04.04 MC)
A skateboard halfpipe is being designed for a competition. The halfpipe will be in the shape of a parabola and v
ground. Using the ground as the x-axis, where should the base of the halfpipe be positioned? Which equation
1
(0, 20); y
x?
+ 20
80
1
(0, 20): Y
x?-
-20
80
1
O(0, 10); y
y-20x+10
0 (0, 10); y ²-10
40+?-1

15: 24

62.5%

step-by-step explanation:

sorry i got nothing

step-by-step explanation:

55.44 inches

step-by-step explanation:

part a. assuming a perfectly linear relationship, we can find the slope from the first two data points.

slope = m = (change in rainfall)/(change in years)

= (61.80 -62.33)/(2005 -2004) = -0.53/1 = -0.53

then the point-slope form of the equation of the line can be written as

y = m(x -h) +k . . . . . m = -0.53, (h, k) = (0, 62.33)

y = -0.53x +62.33 . . . x = years after 2004

part b. in 2017, x = 2017 -2004 = 13. then the predicted rainfall is

y = -0.53·13 +62.33 = 55.44 . . inches

the predicted rainfall in 2017 is 55.44 in.