Answer:
d)87
Step-by-step explanation:
let's find the slope first
[tex]m = \frac{y _{2} -y_1}{x_2 -x_1}[/tex]
[tex]m = \frac{5 - 3}{2 - 1} [/tex]
[tex]m = 2[/tex]
let's find y-intercept
according to the question
3=1.2+b
3=2+b
therefore
b=1
so the equation is
y=2x+1
given
x=43
therefore
y=43.2+1
y=86+1
y=87
