Finding Equations of Lines

If m = 8/5 and b = -8/5, what is the equation of the trend line in y= mx + b?

• 0 = 8/5 (1) - 8/5

• y = -8/5 x + 8/5

• y = 8/5 x - 8/5

• y = mx + b

If m = -3/4 and b = 9, what is the equation of the trend line in y= mx + b?

• 0 = -3/4 (9) +9

• y = -3/4 x + 9

• y = -3/4 x - 9

• y = 3/4 + 9

Find the slope between (1,0) and (6,8)

• m = -8/5

• m = 8/5

• m = 7/6

If you selected point (1,0) and m = 8/5, what substitution is correct to solve for b?

• 1 = 8/5 (0) + b

• 0 = 8/5 (1) + b

• 8/5 = 1 (0) + b

• y = mx + b

What ordered pairs would you use to find the slope for the trend line?

• (9,0) (3,8)

• (0,9) (8,3)

If you selected point (0,9) and m = -3/4 what substitution is correct to solve for b?

• 0 = -3/4 (9) + b

• 9= 3/4 (0) + b

• 9 = -3/4(0) + b

• y = mx + b

What is missing in this equation when the directions were to write an equation in slope intercept form? y = -1 +8

• the x is missing after the negative 1

• it isn't missing anything

What ordered pairs would you use to find the slope for the trend line?

• (1,0) (6,8)

• (8,6) (0,1)

Find the slope between (0,9) and (8,3)

• m = 6/8

• m = -3/4

• m = 3/4

What is the equation of the line tangent to the curve y = x² at x = 1?

• y = 2x + 1

• y = 2x - 1

• y = -2x + 1

• y = x - 1