PSAT Top 10 Formulas, Part 1 of 2

• y = 130000 + 50000x

• y = 130000 - 50000x

• y = 630000 + 50000x

• y = 630000 - 50000x

Answer explanation

Tags

CCSS.HSF-BF.A.1A

Answer explanation

y = mx + b

Tags

CCSS.HSF.LE.B.5

In the xy-plane, line k passes through the points (0, 3) and (6, 0). Which of the following is an equation of line k?

Answer explanation

At a certain dairy farm milk production increased from 450 thousand gallons in 2000 to 3.6 million in 2010. Which of the following linear functions f best models the production, in thousands of gallons, t years after 2000?

• f(t) = 9t + 450

• f(t) = 315t + 450

• f(t) = -9t + 450

• f(t) = -315t + 450

Answer explanation

Tags

CCSS.HSF-BF.A.1A

According to the graph, by how many dollars is the cost of the ball bearing reduced for each additional ball bearing order?

• 0.025

• 0.25

• 4

• 6.25

Answer explanation

Tags

CCSS.HSF.LE.B.5

Answer explanation

Kathie bought a teapot at a kitchen supply store that gave a 25% discount off the original price. The total amount she paid was t dollars, including a 6% sales tax on the discounted price. Which of the following represents the original price of te teapot in terms of t?

Answer explanation

Tags

CCSS.7.EE.B.4A

Answer explanation

Tags

CCSS.HSF.BF.A.2