Equations Of Lines Worksheet With Answers (Page 4 of 5) in pdf

Equations Of Lines Worksheet With Answers Page 4

Write an equation in slope-intercept form for each line described.

38. passes through (–1, –10), parallel to y = 7

ANSWER:

3-4 Equations of Lines

y = –10

40. passes through (–2, 2), perpendicular to y = –5x – 8

ANSWER:

42. CCSS MODELING Victor is saving his money to buy a new satellite radio for his car. He wants to save enough

money for the radio and one year of satellite radio service before he buys it. He started saving for the radio with $50

that he got for his birthday. Since then, he has been adding $15 every week after he cashes his paycheck.

a. Write an equation to represent Victor’s savings y after x weeks.

b. Graph the equation.

c. How long will it take Victor to save $150?

d. A satellite radio costs $180. Satellite radio service costs $10 per month. If Victor started saving two weeks ago,

how much longer will it take him to save enough money? Explain.

ANSWER:

a. y = 15x + 50

c. 7 wk

d. 15; If Victor started saving two weeks ago, he already has $50 + $15 + $15 or $80. He needs to save $180 + 12

($10) or $300. He still needs to save $300 − $80 or $220. Dividing $220 by $15, it will take 15 more weeks for Victor

to save enough money.

Name the line(s) on the graph shown that match each description.

44. perpendicular to

ANSWER:

Determine whether the lines are parallel , perpendicular , or neither.

46. y = 2x + 4, y = 2x – 10

eSolutions Manual - Powered by Cognero

Page 4

ANSWER:

parallel

Equations Of Lines Worksheet With Answers Page 4