Answer:
C
Step-by-step explanation:
it is very simple : we put the x values into the functions and calculate the corresponding y values - and compare this to the y values of the data set points.
A
y = (1/2)x - 3
test for (2, -2)
-2 = 1/2 × 2 - 3 = 1 - 3 = -2 correct
test for (6, 10)
10 = 1/2 × 6 - 3 = 3 - 3 = 0 wrong
so, A cannot be right.
B
y = -2x + 2
test for (2, -2)
-2 = -2×2 + 2 = -4 + 2 = -2 correct
test for (6, 10)
10 = -2×6 + 2 = -12 + 2 = -10 wrong
so, B cannot be right.
C
y = 3x - 8
test for (2, -2)
-2 = 3×2 - 8 = 6 - 8 = -2 correct
test for (6, 10)
10 = 3×6 - 8 = 18 - 8 = 10 correct
test for (13, 31)
31 = 3×13 - 8 = 39 - 8 = 31 correct
so, C is a right answer.
D
y = 4x - 10
test for (2, -2)
-2 = 4×2 - 10 = 8 - 10 = -2 correct
test for (6, 10)
10 = 4×6 - 10 = 24 - 10 = 14 wrong
so, D cannot be right.
