Which of functions below is non-linear?

(A) |
y = 2x^{2} +3x + 1 |

(B) |
y = 3x– 1 |

(C) |
y = 2x +5 |

(D) |
y = 4 (x-3) |

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# Grade 8 Common Core Math Tests Question 14

Which of functions below is non-linear?

(A) |
y = 2x^{2} +3x + 1 |

(B) |
y = 3x– 1 |

(C) |
y = 2x +5 |

(D) |
y = 4 (x-3) |

How much time will an old car take to cover a distance of 39 miles at a speed of 13 miles/hour? Express distance as a function of time.

(A) |
3 hr, y =13x |

(B) |
3 hr, y =3x C |

(C) |
13 hr, y=39x |

(D) |
3 hr, x= 13y |

Write the number 0.00000123 in scientific notation.

(A) |
123 |

(B) |
123 x 10^{6} |

(C) |
1.23 x 10^{6} |

(D) |
1.23 x 10^{-6} |

Which of the following ordered pairs satisfies both equations and ?

A) |
(0, −4) |

B) |
(2, 6) |

C) |
(3, 14) |

D) |
(5, 9) |

The formula is used to calculate the distance an object travels over a period of time, , at a constant rate, . Based on this formula, what is the rate, , in terms of and ?

A) |

B) |

C) |

D) |

If and what is the value of ?

(A) |
2 |

(B) |
4 |

(C) |
9 |

(D) |
10 |

Find the point of intersection of the two lines

y = 3x+2 and y = 2x- 1

(A) |
(7,3) |

(B) |
(-3,7) |

(C) |
(3, -7) |

(D) |
(-3,-7) |

Which of the following is a solution to the equation ?

A) |
-1 |

B) |
0 |

C) |
3 |

D) |
6 |

The minute hand of a clock is 6cm long. How far does the tip of the minute hand travel in 15 minutes?

(A) |
12πcm |

(B) |
9πcm |

(C) |
6πcm |

(D) |
3πcm |

Which ordered pair would fit the function: y = 3x -2

(A) |
0, 2 |

(B) |
1, -1 |

(C) |
2, 4 |

(D) |
-1, 1 |