A)
Evaluate the function for x = 2: f(x) = 7x – 5
(1 point)
9
19
–9
–19
To evaluate the function for x = 2, we substitute 2 into the function:
f(2) = 7(2) - 5 = 14 - 5 = 9
Therefore, the answer is 9.
A)
Candy is on sale for $0.75 each. You have a coupon for $0.25 off your total purchase. Write
a function rule for the cost of n pieces of candy.
(1 point)
C(n) = 0.25n – 0.75
C(n) = 0.75n – 0.25
C(n) = 1.0n
C(n) = 0.75n
To write the function rule for the cost of n pieces of candy, we need to consider that each piece of candy costs $0.75 and there is a coupon for $0.25 off the total purchase.
Since the $0.25 coupon is subtracted from the total cost, the function rule will be:
C(n) = 0.75n - 0.25
Therefore, the correct answer is C(n) = 0.75n - 0.25.
A)
The ordered pairs (0, 0), (2, 4), (4, 8), and (6, 12) represent a function. What is the rule for
this function?
(1 point)
y = x +2
y = 3x
y = x + 4
y = 2x
To determine the rule for this function, we can observe the relationship between the x-values and the y-values in the given ordered pairs.
If we look at the first ordered pair (0, 0), we see that the y-value is equal to the x-value plus 0. This suggests that the rule for this function is y = x + 0, which simplifies to y = x.
However, when we examine the other ordered pairs (2, 4), (4, 8), and (6, 12), we find that the rule y = x does not hold. In fact, the y-values are double the x-values in each of these pairs.
Therefore, the correct rule for this function that satisfies all the given ordered pairs is y = 2x.
Hence, the answer is y = 2x.