Marissa wants to write an abbreviated set of directions for finding coordinates of a figure reflected across the y-axis. which mapping notation is correct?
1. (x, y) --> (-x, y)
2. (x, y) --> (x,-y)
3. (x, y) --> (-x,-y)
4. (x, y) --> (y, x)

1. (x,y) --> (-x,y)

Step-by-step explanation:

We are given that,

Marissa needs to write the rule for finding the co-ordinates of a figure reflected across the y-axis.

We know,

Reflection flips the figure over the line of reflection.

So, the reflection of a figure over y-axis will flip the figure over y-axis.

Thus, we get that there will be no change in the y-co-ordinate and the x co-ordinate will be multiplied by a negative sign.

So, the co-ordinates can be found out by the rule,

(x,y)   >   (-x,y).

Hence, option 1 is correct.

answer: 7 x 2/5 = 2.8 hours, is your answer. your welcome! : 3

step-by-step explanation: first work out how long it took to hose 1/7 of the lawn which is 2/5 hours. times that by 7 to get the whole lawn.

sorry i don't know the other answer. i didn't learn what a proportional relationship is.

i'm a sophomore in connections, i'd recommend checking on jishka.com they have a large range of questions and answers from our school.