Which linear function represents the line given by the point-slope equation

y – 8 = 1/2(x – 4)?

f(x) =1/2 x + 4

f(x) =1/2 x + 6

f(x) = 1/2x – 10

f(x) =1/2 x – 12

Rewrite the given y – 8 = 1/2(x – 4), replacing "y" with "f(x)."

Then f(x) – 8 = 1/2(x – 4)

Multiply all 3 terms by 2 to eliminate the fraction (1/2):

2f(x) = 16 + x - 4

Combine like terms: 2f(x) = x + 12

x + 12

Divide both sides by 2: f(x) =

2

Note that this is equivalent to f(x) = (1/2)x + 6. Important: Use parentheses as indicated.

r and t.

both are 64 degrees.

answer: c, the green line

step-by-step explanation:

there is no black line, eliminate b.

simple interest implies periodic payments, but the red line shows no payments, eliminate d.

simple interest has equal payments. if paid say every day, the graph is about a straight line (actually a stairstep).

the yellow line is not straight, eliminate a.

check: the green line is straight, answer is c.

simple interest with positive interest rate gives a straight line sloping up to the right. green line:

g(t) = $100 + ($200-$100) ÷ (20 years) × (t years)

= $100 + (4%/year) × ($100)(t years)

incidentally, the yellow line curving upward represents continuously compounded interest

y = $100 × 2^(t years / (14 assuming the yellow line hits $200 at 14 years. 2^0 is 1, so y(0) = $100; 2^(14/14) is 2, so y(14) = $200.