Algebra 1 Unit 2 Test Review

Front

y = -3x + 2: Find y-intercept and x-intercept.

Back

y-intercept: 2, x-intercept: -2/3

Front

Equation in slope-intercept form for page number y as a function of time x, given: After 5 minutes, page 10; after 10 minutes, page 22.

Back

y = 2.4x - 2

Front

Linear equation for hours left after x days if Samantha does 1.5 hours/day and completes 1/3 of total service in 10 days.

Back

y = 45 - 1.5x

Answer explanation

Plud the 10 and multiply it by the rate 1.5. That means that in 10 days she completed 15 hours.

15 hrs is a third of her total, so her total hours b = 3(15) which is 45.

Hence she originally needed to complete 45 hours.

Front

What does the y-intercept of a graph represent?

Back

the point where the graph crosses the y-axis

Front

A ball is thrown into the air from a point located 10 feet to the right of a building (the building is at the origin). Suppose the ball's path is modeled by a linear equation. Which values for A, B, and C represent the ball’s path in the equation Ax+By=C?

Back

A = 1, B = 0, C = 10

Answer explanation

Remember that for any vertical line, the equation is x=a, where a is the point at which the line intersects the x-axis. In this case, the line is at x=10.

The ball was thrown upwards, without any change in motion, hence it moves in a vertical line.

Front

Equation in point-slope form for balance, y, on Lisa's coffee card after buying lattes at 2 dollars each, starting with 3 dollars.

Back

y - 3 = -2(x - 1)

Front

Equation in point-slope form for remaining distance, y, from home after x hours of travel. Smith family travels at 60 mph, 90 miles from home after 1.5 hours.

Back

y - 90 = -60(x - 1.5)

Front

Equation modeling the height y (in cm) of a candle after x minutes from when it was lit. Given: 30 min -> 40 cm, 90 min -> 15 cm.

Back

y = 55 - 0.5x

Front

Find the x- and y-intercepts of the line represented by: 8x - 5y = 40

Back

x-intercept: (5,0), y-intercept: (0,-8)

Front

Equation for the graph of the line: 2x+4y=12, 5x+8y=40, 3x+6y=12, 4x+2y=12

Back

2x+4y=12