How do you tell if the equation 2y=8 is linear; how do you graph it?

In the coordinate plan (-6,9) b (3,9) c (3,3) def is shown in the coordinate plan below

The average human heart beats 1.15 \cdot 10^51.15⋅10 5 1, point, 15, dot, 10, start superscript, 5, end superscript times per day. there are 3.65 \cdot 10^23.65⋅10 2 3, point, 65, dot, 10, start superscript, 2, end superscript days in one year.how many times does the heart beat in one year? write your answer in scientific notation, and round to one decimal place.

State if the two triangles are congruent. if they are, state how you know?