SAT 10 Test 3 Math 6-10

SAT 10 Test 3 Math 6-10

by Christy Kessler

Multiple Choice

What are all values of x that satisfy the equation?

• -3

• 0

• 1

• -3 and -1

​Correct Answer: -3

Multiple Choice

The graph of y = f (x) is shown in the xy -plane.

What is the value of f (0) ?

• 0

• 2

• 3

• 4

​Correct answer: 4

​When x = 0 on this graph y = 4

Multiple Choice

In this figure, point B lies on line AD. What is the value of 3x?

• 18

• 36

• 54

• 72

​Correct answer: 54

​x + 2x + 2x = 90 so 5x = 90 so x = 18.

​

​Be careful to read the question! 18 is an option but that's not the question. The question is what is 3x.

​

​3(18) = 54

Multiple Choice

Which of the following is an equation of line l in the

xy -plane above?

• x - y = -4

• x - y = 4

• x + y = -4

• x + y = 4

​Correct answer: x + y = -4

​The y intercept for this line is -4 and the line has a slope of -1.

​

​In y-intercept form, that would be

y = -x - 4 which can be written as

x + y = - 4

Multiple Choice

The graph of y = 2x² + 10x + 12 is shown. If the

graph crosses the y -axis at the point ( 0, k) , what is the value of k ?

• 2

• 6

• 10

• 12

​Correct answer: 12

​The question asks us for the y coordinate when x = 0.

​

​So put x = 0 in this equation:

​y = 2x² + 10x + 12

​y = 2(0)² + 10(0) + 12

y = 12