R is equal to the sum of twenty-one and y *

r=21+y

Step-by-step explanation:

its telling you that r is going to be equal to the rest of the equation, so we start with

r=

then, it mentions the sum of 21 and y, so this would be represented as

21+y

since r is equal to the sum of 21 and y, your answer is

r=21+y

(because of comutitive property, r=y+21 is also an acceptable answer.)

3432532

step-by-step explanation:

it has the same slope and a different y-intercept

hope this : )