1. Given (x) =1/2(x + 4)(x – 11), use your graphing calculator to graph this function and then answer the following questions.
a) Type of function:
b) x-intercept(s);
y-intercept:
c) Increasing:
Decreasing:
d) Positive:
Negative:
e) Maximum:
Minimum:
1) Domain:
g) Rate of change of this function on the interval x=7 to x=9:
h) Sketch a graph-label and scale both axes appropriately:

Researchers were interested in whether relaxation training decreases the number of headaches a person experiences. they randomly assigned 20 participants to a control group or a relaxation training group and noted the change in number of headaches each group reported from the week before training to the week after training. which statistical analysis should be performed to answer the researchers' question?

Desmond wants to sell his car that he paid $8,000 for 2 years ago. the car depreciated, or decreased in value, at a constant rate each month over a 2-year period. if x represents the monthly depreciation amount, which expression shows how much desmond can sell his car for today? \ 8,000 + 24x 8,000 - 24x 8,000 + 2x 8,000 - 2x

Charlie is at an amusement park that has 18 different rides. each ride costs $1.75. the function c(r) = 1.75r represents the total amount of money that charlie will spend if he goes on r rides, but he never goes on the same one more than once. what domain and range are reasonable for the function?