Average of 0,444 in 45 battings can be wirtten as:
45 * 44,4% = 19,98
After rounding it up it'll give us 20 and that's exactly how many hits Karen got.
Slope-intercept you have right:
y=3/4x-7
Point slope form is:
y − y1 = m(x − x1)
so
y +7 = 3/4(x -0)
or
y + 7 = 3/4x
Point a is the correct answer for this question
Take the 2 times you are given and add them to x and divide the entire left side of the equation by 3:
54.3+56.1+x/3=55
54.3+56.1+x=165
x=54.6
The 3rd lap took him 54.6 seconds to run
