Ack took a test and got 13 out of 17 points. he took a make-up test and got 12 out of 15 points. the percent of increase in jack's score is about 3.5% 4.6% 5.9% 6.7%

-16.471%

Step-by-step explanation:

Given that Ack took a test and got 13 out of 17 points. he took a make-up test and got 12 out of 15 points.

As such we cannot compare these marks as they are out of different numbers.

To make comparison easier, let us convert both scores into percentages

Points scored by Ack in I test = %

Points scored in Make up test =%

There is an increase of 16.471%over the make up test

Percent change (increase) = -16.471%

(None of the options given are right)

options a,b,c are the right answer.

step-by-step explanation:

a linear parent function is always represented as y = x

if we write this function in the form of y=mx+c

⇒

or  

now if we plot a graph we will find these characteristics:

1) y intercept of the graph is zero so its a straight line passing through origin.

2) as we can see in both the forms of function written, values of x and y may be either positive or negative for the positive slope means points on the graph are either in first quadrant or in third one.

3) it's slope is one.

-2x + 7 = 7

subtract 7 from both sides.

-2x = 0

divide both sides by -2.

x = 0