A multiple choice examination consists of 40 questions. The scoring is +5 for each correct answer, -2 for each incorrect answer, and 0 for each unanswered question. Noel's score on the examination is 67. What is the minimum number of questions he could have answered correctly?

15

Step-by-step explanation:

65+5= 70 - 2 = 68

= 70-4 = 66 (so not 14)

75 - 8 = 67

Which means: 15 correct, 4 incorrect and others attempted

step-by-step explanation:

let

we know that

the y-intercept is the y-coordinate of the point when the value of x is equal to zero

so

the y-coordinate of the point a is the y-intercept

the answer part a) is

the value of y-intercept is

part b) find the slope m

we know that

the value of the slope is equal to

substitute the values

therefore

the answer part b) is

the value of the slope is equal to

the general answer is

the slope is

the value of y-intercept is

answer: b

step-by-step explanation: