Question

Zachary purchased a computer for $1,600 on a payment plan. Two months after he purchased the computer, his balance was$1,370. Four months after he purchased the computer, his balance was $1,140. What is an equation that models the balance y after x months? Answers 1. Answer: Step-by-step explanation: 1. y = x + 3 2. y = −5x + 1 3. y = __ 2 3 x − 5 y 4 2 O x −2 −4 −2 2 4 −4 y 4 2 O x −2 −4 −2 2 4 −4 y O x −2 2 −4 −2 2 4 −4 What slope-intercept form equation represents the line? 4. 5. 6. y O x −2 2 4 6 −4 −2 2 4 y O x −2 2 −4 −2 2 4 −4 y 4 2 O x −2 −4 −2 2 4 −4 Write the equation in slope-intercept form of the line that passes through the given points. 7. (−1, 3) and (−3, 1) 8. (−4, 8) and (4, 6) 9. (9, 2) and (−3, −2) 10. Zachary purchased a computer for$1,800 on a payment plan. Three months
after he purchased the computer, his balance was $1,350. Five months after he purchased the computer, his balance was$1,050. What is an equation that
models the balance B after m months?
11. What does the slope signify in this equation and why?
y = 2x + 1
y = x + 4 y = −__
1
4x + 7 y = __
1
3
x − 1
y = −5 y = −__
1
2
x + 4
B = −150m + 1800
In the equation B = −150m + 1800, the slope signifies the
monthly payment amount because the balance decreases by
\$150 each month.