7
practice testMultiple Choice

Practice Test

Question 7 • Mathematics 8

Arnoldo needs to write this system in slope-intercept form. Which shows how he could do that? 3 x minus 2 y is equal to 6 0 point 4 times open paren 20 y plus 15 close paren is equal to x

Answer
A
y is equal to negative 3 halves x plus 3 y is equal to 1 eighth x minus 3 fourths
B
y is equal to 3 halves x minus 3 y is equal to 1 fifth x minus 15 fourths
C
y is equal to 3 halves x minus 3 y is equal to 1 eighth x minus 3 fourths
D
y is equal to negative 3 halves x minus 3 y is equal to 1 fifth x minus 15 fourths

Explanation

For the first equation, 3x − 2y = 6, isolate y to get y = (3/2)x − 3. For the second, distribute 0.4 to get 8y + 6 = x, then isolate y to get y = (1/8)x − 3/4. These equations match choice C.

AI-written and checked against the verified answer.

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